keyword
MENU ▼
Read by QxMD icon Read
search

Use

keyword
https://www.readbyqxmd.com/read/29692101/-effect-of-long-term-application-of-npk-fertilizer-on-maize-yield-and-yellow-soil-nutrients-sustainability-in-guizhou-china
#1
Yan Ling Liu, Yu Li, Ya Rong Zhang, Xing Cheng Huang, Wen An Zhang, Tai Ming Jiang
A long-term fertilization field experiment was conducted to investigate the effect of nitrogen (N), phosphorus (P), and potassium (K) fertilizer on maize relative yield, yield-increasing effect and the changes of nutrients in yellow soil in Guizhou Province. Five fertilizer combinations were evaluated, including balanced fertilization (NPK) and nutrient deficiency treatments (N, NK, NP, and PK). The maize relative yield, contribution efficiency of N, P, K fertilizer application, sustainability index of soil N, P, K nutrients, and other indicators were measured...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692100/-response-of-indica-rice-spikelet-differentiation-and-degeneration-to-air-temperature-and-solar-radiation-of-different-sowing-dates
#2
Ya Liang Wang, Yu Ping Zhang, Jing Xiang, Lei Wang, Hui Zhe Chen, Yi Kai Zhang, Wen Qian Zhang, De Feng Zhu
In this study, three rice varieties, including three-line hybrid indica rice Wuyou308 and Tianyouhuazhan, and inbred indica rice Huanghuazhan were used to investigate the effects of air temperature and solar radiation on rice growth duration and spikelet differentiation and degeneration. Ten sowing-date treatments were conducted in this field experiment. The results showed that the growth duration of three indica rice varieties were more sensitive to air temperature than to day-length. With average temperature increase of 1 ℃, panicle initiation advanced 1...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692099/-effects-of-spraying-p-and-k-fertilizers-during-panicle-primordium-differentiation-stage-on-cold-resistance-yield-and-physiological-characteristics-of-early-rice
#3
Na Cao, Xiao Rong Chen, Hao Hua He, Chang Lan Zhu, Shuo Cai, Tao Xu, Heng Wang Xie, Fang Ping Liu
Super hybrid early rice variety Ganxin 203 was used as test material, and four foliar spraying treatments were set using clear water as the control group (CK), and 3 concentrations of potassium dihydrogen phosphate (KH2 PO4 ) with 0.1% (P1), 0.3% (P3), 0.5% (P5) and po-tash (MH). The effects of spraying P and K fertilizers on the leaf temperature, yield and physiolo-gical characteristics in double-season early rice under low temperature conditions during panicle primordium differentiation stage were studied...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692097/-spatial-heterogeneity-of-soil-moisture-of-mountain-apple-orchards-with-rainwater-collection-and-infiltration-rwci-system-in-the-loess-plateau-china
#4
Xiao Lin Song, Xi Ning Zhao, Xiao Dong Gao, Pu Te Wu, Wen Ma, Jie Yao, Xiao Li Jiang, Wei Zhang
Water scarcity is a critical factor influencing rain-fed agricultural production on the Loess Plateau, and the exploitation of rainwater is an effective avenue to alleviate water scarcity in this area. This study was conducted to investigate the spatial and temporal distribution of soil moisture in the 0-300 cm under a 21-year-old apple orchard with the rainwater collection and infiltration (RWCI) system by using a time domain reflectometer (TDR) probe on the Loess Plateau. The results showed that there was a low soil moisture zone in the 40-80 cm under the CK, and the RWCI system significantly increased soil moisture in this depth interval...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692096/-effects-of-light-quality-on-leaf-senescence-and-endogenous-hormones-content-in-grapevine-under-protected-cultivation
#5
Hai Bo Wang, Shuai Wang, Xiao di Wang, Xiang Bin Shi, Bao Liang Wang, Xiao Cui Zheng, Zhi Qiang Wang, Feng Zhi Liu
Two grape varieties 'Italia' and 'Centenial seedless' cultured in protected and delayed cultivation were used as experimental materials to study the effects of red and blue light quality on chlorophyll content, net photosynthetic rate, and endogenous hormone content during leaf senescence. The results showed that the chlorophyll content and net photosynthetic rate of the grapes were significantly enhanced in the red light treatment. Although the content of endogenous GA3 was decreased, an increase in abscisic acid (ABA) content and a decrease of total content of zeaxanthin (ZR) were obviously slowed, which led to the significant increase in value of (GA3 +ZR)/ABA, delaying leaf senescence...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692095/-effects-of-selenium-valence-states-and-application-concentrations-on-plant-growth-ascorbate-glutathione-cycle-in-citrus-junos-cv-ziyang-xiangcheng
#6
Xie Ping Sun, You Jin Luo, Guang Wen Zhou, Hong Wei Yi, Yuan Ping Chen, Zheng Wu, Yong Hong Xie
Potted Citrus. junos cv. Ziyang Xiangcheng seedlings were used to study the effects of selenium (Se) valence states (Se6+ and Se4+ ) on plant growth and antioxidants and antixodases in ascorbate(AsA)-glutathione (GSH) cycle. The results showed that Se6+ and Se4+ (from 1.0 mg·L-1 to 8.0 mg·L-1 ) stimulated the seedling growth by increasing plant height, leaf areas, and fresh or dry mass. Applying Se6+ significantly increased plant Se levels mainly in leaf, and applying Se4+ slightly increased Se content mainly in root...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692094/-dynamics-of-and-relationship-between-fat-accumulation-and-enzyme-activities-of-precocious-walnut
#7
Shuang Zhao, Yang Liu, Han Li, Yi Lan Chen, Bao Guo Li, Guo Hui Qi, Xue Mei Zhang
Two precocious walnut varieties, Lvling and Lvzao were used as materials in this study, the kernel fat contents and 3 related enzyme activities in different development periods after flowe-ring 50 days were analyzed. The key enzymes affecting walnut fat in different periods were illumina-ted. The results showed that the kernel fat accumulation trends of the two varieties were basically the same. The kernel began to solidify 50 days after flowering, and the increase in kernel fat content was rapid 60-90 days after flowering, slowed down 90-120 days after flowering, and stopped 120-130 days after flowering...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692089/-effects-of-elevated-ozone-concentrations-on-reactive-oxygen-metabolism-and-related-gene-expression-in-ginkgo-biloba-leaves
#8
Ya Nan Ruan, Sheng Xu, Long Guo, Ming Zhu Zhu, Cong Wang, Shu Yuan Li, Hong Yan Wang
By using the open top chambers (OTCs) fumigation method, this paper investigated the changes of foliar injury, level of reactive oxygen species (ROS), activities and gene expression of antioxidant enzymes in Ginkgo biloba leaves under different ozone (ambient ozone≈40, 80, 160, 200 nmol·mol-1 ) concentrations, in order to study the effects of elevated ozone (O3 ) concentrations on reactive metabolism. The results showed that the obvious foliar injuries were observed in 160 and 200 nmol·mol-1 O3 treatments, while no visible injury was observed in 80 nmol·mol-1 O3 and ambient O3 treatments...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692088/-sap-flux-density-in-response-to-rainfall-pulses-for-pinus-tabuliformis-and-hippophae-rhamnoides-from-mixed-plantation-in-hilly-loess-plateau
#9
Sen Bao Lu, Yun Ming Chen, Ya Kun Tang, Xu Wu, Jie Wen
Thermal dissipation probe (TDP) was used to continuously measure the sap flux density (Fd ) of Pinus tabuliformis and Hippophae rhamnoides individuals in hilly Loess Plateau, from June to October 2015, and the environmental factors, i.e., photosynthetic active radiation (PAR), water vapor pressure deficit (VPD), and soil water content (SWC), were simultaneously monitored to clarify the difference of rainfall utilization between the two tree species in a mixed plantation. Using the methods of a Threshold-delay model, stepwise multiple regression analyses, and partial correlation analyses, this paper studied the process of Fd in these two species in response to the rainfall pulses and then determined the effects of environmental factors on Fd ...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692085/-application-of-non-invasive-microelectrode-ion-flux-estimation-technique-in-crop-stress-physiology
#10
Ke Liu, Bing Lin Zhang, Wen Ying Zhang, Yun Bo Zhang, Xiao Hai Tian
Non-invasive microsensing technique has been widely used in evaluating the adaptive responses of plant cells and tissues to abiotic stresses. One of the representative techniques is the microelectrode ion flux estimation (MIFE), which allows concurrent quantification of net fluxes with high spatial and temporal resolution. More importantly, this technique permits simultaneous recording of ion concentration and mobility with less intervention to the in situ physiological status. With the availability of such advanced technique, the last three decades have seen a significant progress towards the role of ion signaling in a variety of abiotic stresses including salinity, extreme temperature, osmotic stress, hypoxia, and drought...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692084/-advances-in-the-studies-on-topographic-effects-of-vegetation-indices
#11
Hui Zhang, Ping Heng Li, Guo Mo Zhou, Yu Feng Zhou
Vegetation index is a key indicator for qualitative and quantitative assessment of green vegetation, which has been widely used in vegetation monitoring. Forests are often distributed in mountainous areas with complex topography, which is one of the main factors of accurate retrieval of forest vegetation information. Here, we analyzed the topographic effects on canopy reflectance using a geometric optical model. The responses of complete ratio vegetation indices [simple ratio index (SR), normalized difference vegetation index (NDVI) and moisture adjusted vegetation index (MAVI)], incomplete ratio vegetation indices [enhanced vegetation index (EVI) and soil adjusted vegetation index (SAVI)], non-ratio vegetation indices [reduced simple ratio (RSR), modified normalized difference vegetation index (MNDVI), greenness vegetation index (GVI)] and, topography adjusted vegetation index [topography adjusted vegetation index (TAVI)] to topography were discussed in detail, with the aim to provide reference for selecting vegetation index in complex terrain mountainous area...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692083/-the-role-of-white-gene-and-its-mechanism-during-the-formation-of-curly-wing-in-drosophila-melanogaster
#12
Cheng Li Wu, Xin da Lin, Yan Yun Jiang, Shuai Shuai Meng
Curly wing is one of the most frequently used genetic markers in Drosophila melanogaster, but its molecular mechanism is remained unclear. Previous results have showed that physicochemical stimulation would affect the formation of the cruly wing. Our recent study found that H2 O2 could not only affect the eclosion rate of D. melanogaster, but also induce the formation of curly wing. Here, we aimed to uncover the specific factors influencing the formation of curly wing in D. melanogaster via changing the concentration of H2 O2 and the temperature as well as the time of H2 O2 treatment...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692081/-simulation-of-rainfall-and-snowmelt-runoff-reduction-in-a-northern-city-based-on-combination-of-green-ecological-strategies
#13
Jin Feng Han, Shuo Liu, Jun Dai, Hao Qiu
With the aim to control and reduce rainfall and snowmelt runoff in northern cities in China, the summer runoff and spring snowmelt runoff in the studied area were simulated with the establishment of storm water management model (SWMM). According to the climate characteristics and the situation of the studied area, the low impact development (LID) green ecological strategies suitable for the studied area were established. There were three kinds of management strategies being used, including extended green roof, snow and rainwater harvesting devices, and grass-swales or trenches...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692080/-landscape-pattern-and-its-vulnerability-of-nansihu-lake-basin-during-1980-2015
#14
Yan Xui, Xiao Yin Sun, Da Zhi Zhang, Rui Feng Shan, Fei Liu
Landscape pattern and its vulnerability have direct impacts on ecological environment in the basin. In order to protect the ecological security in Nansihu Lake basin, we analyzed the changes of landscape pattern based on seven sets of land use data (1980-2015), with landscape adaptability index (LAI) and landscape sensitivity index (LSI) being used to build the landscape vulnerability index (LVI). The spatial distribution and changes of LVI were analyzed. Results showed that the percentage of arable land areas decreased by 4...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692079/-characteristics-of-temporal-spatial-differentiation-in-landscape-pattern-vulnerability-in-nansihu-lake-wetland-china
#15
Jia Xin Liang, Xin Ju Li
With remote sensing images from 1985, 2000 Lantsat 5 TM and 2015 Lantsat 8 OLI as data sources, we tried to select the suitable research scale and examine the temporal-spatial diffe-rentiation with such scale in the Nansihu Lake wetland by using landscape pattern vulnerability index constructed by sensitivity index and adaptability index, and combined with space statistics such as semivariogram and spatial autocorrelation. The results showed that 1 km × 1 km equidistant grid was the suitable research scale, which could eliminate the influence of spatial heterogeneity induced by random factors...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692078/-temporal-characteristics-of-soil-fertility-of-cropland-requisition-compensation-in-the-typical-region-of-yangtze-river-delta-china
#16
Zhi Chao Xui, Dong Sheng Yu, Yue Pan, Xi Yang Wang, Jing Jing Huang, Bo Sun
Based on the satellite image in 1984, 2000 and 2016, we analyzed the temporal and spatial variation of cropland requisition-compensation in Changshu City, Jiangsu Province. Based on ArcGIS and the data of soil samples, membership function with integrated fertility index were used to evaluate the soil fertility in 1984 and 2000, respectively. The overlay analysis had been used to reveal the characteristics of soil fertility of cropland requisition-compensation between the period of 1984 to 2000 and 2000 to 2016...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692077/-spatial-temporal-pattern-of-sustainable-intensification-of-agricultural-land-use-in-shandong-province-china
#17
Shan Dong Niu, Xiao Lyu, Yang Yang Shi
Under the theoretical framework of sustainable intensification of agricultural land-use (SIALU), We used material flow analysis (MFA) method to establish evaluation index system for SIALU by utilizing data in 2000, 2005, 2010 and 2015 to quantify the level of SIALU of 17 cities in Shandong Province, and analyzed the variation in input-output of resources factors of agricultural land, spatial distribution of resource productivity and environmental economic efficiency, in order to reveal spatial-temporal differentiation of SIALU...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692076/-differences-of-vegetation-phenology-monitoring-by-remote-sensing-based-on-different-spectral-vegetation-indices
#18
Lu Zuo, Huan Jiong Wang, Rong Gao Liu, Yang Liu, Rong Shang
Vegetation phenology is a comprehensive indictor for the responses of terrestrial ecosystem to climatic and environmental changes. Remote sensing spectrum has been widely used in the extraction of vegetation phenology information. However, there are many differences between phenology extracted by remote sensing and site observations, with their physical meaning remaining unclear. We selected one tile of MODIS data in northeastern China (2000-2014) to examine the SOS and EOS differences derived from the normalized difference vegetation index (NDVI) and the simple ratio vegetation index (SR) based on both the red and near-infrared bands...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692075/-phosphorus-application-effects-and-input-threshold-of-chinese-cabbage-in-the-oasis-irrigation-region
#19
Cai Yun Lian, Zhong Ming Ma
To resolve the problem of higher application and lower use efficiency of phosphorus fertilizer of Chinese cabbage (Brassica pekinensis), the yield, use efficiency of phosphate fertilizer and soil phosphate balance were examined by a located field trial in Zhangye Observation and Experiment Station of the Agro-ecological Environment in oasis irrigation region from 2011 to 2013. The results showed that the yield increased with the increase of phosphorus fertilization rate from 0 to 112.52 kg P·hm-2 , beyond which there would be no further enhancement...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692074/-photosynthetic-physio-ecological-characteristics-in-soybean-leaves-at-different-co-2-concentrations
#20
Zi Piao Ye, Hua Jing Kang, Shi Hua Duan, Yi Juan Wang
The availability of CO2 , a substrate for photosynthesis, affects the photosynthesis process and photosynthate production. Using the Li-6400-40B, we measured the photosynthetic electron transport rate and the photosynthetic light-response curves of soybean (Glycine max) leaves at different CO2 concentrations (300, 400, 500 and 600 μmol·mol-1 ). By fitting these parameters with a mechanistic model characterizing the light response of photosynthesis, we obtained aseries of photosynthetic parameters, eco-physiological parameters, as well as the physical parameters of photosynthetic pigments...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
keyword
keyword
21705
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"