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https://www.readbyqxmd.com/read/29692102/-soil-olsen-p-content-changing-trend-and-its-relationship-with-phosphorus-surplus-and-crop-yield-under-long-term-fertilization-in-loessial-soil-region-on-the-loess-plateau-china
#1
Sheng Zhe E, Zhi Qi Yang, Xi Bai Zeng, Ya Nan Wang, Zhao Xia Luo, Jin Hua Yuan, Zong Xian Che
The changing trend of soil available phosphorus (Olsen-P) content in soil and its relationship with soil phosphorus surplus and crop yield are fundamental when making appropriate phosphate fertilizer recommendations. In this paper, the influences of long-term fertilization on crops phosphorus uptake, soil phosphorus surplus, changing trend of soil available phosphorus content and relationships of soil available phosphorus content with soil phosphorus surplus and crop yield were investigated through 34 years (1981-2015) long-term trial in loessial soil region on the Loess Plateau...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
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
#2
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/29692098/-effects-of-moss-dominated-biological-soil-crusts-on-soil-enzyme-activities-in-water-wind-erosion-crisscross-region-on-the-loess-plateau-of-china
#3
Yan Feng Wang, Bo Xiao, Bing Wang, Shuang Ma, Xiao-Meng Yao
The 30-year-old biological soil crusts dominated by mosses (hereafter moss crusts) and corresponding uncrusted soil (hereafter no crust) were sampled on loess soil and aeolian soil at 0-12 cm depth on the Loess Plateau of China. Afterwards, the hydrolase activities of the samples were measured, and their correlations with soil physicochemical properties were analyzed. Compared with no crust, the activities of urease, alkaline phosphatase, invertase, and protease of the moss crusts were 2.4, 7.6, 20.7, 2.4 times higher on loess soil, respectively; while they were 3...
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/29692094/-dynamics-of-and-relationship-between-fat-accumulation-and-enzyme-activities-of-precocious-walnut
#5
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
#6
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
#7
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/29692083/-the-role-of-white-gene-and-its-mechanism-during-the-formation-of-curly-wing-in-drosophila-melanogaster
#8
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
#9
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/29692079/-characteristics-of-temporal-spatial-differentiation-in-landscape-pattern-vulnerability-in-nansihu-lake-wetland-china
#10
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
#11
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/29692055/-multi-temporal-scale-analysis-of-impacts-of-extreme-high-temperature-on-net-carbon-uptake-in-subtropical-coniferous-plantation
#12
Mi Zhang, Xue Fa Wen, Lei Ming Zhang, Hui Min Wang, Yi Wen Guo, Gui Rui Yu
Extreme high temperature is one of important extreme weathers that impact forest ecosystem carbon cycle. In this study, applying CO2 flux and routine meteorological data measured during 2003-2012, we examined the impacts of extreme high temperature and extreme high temperature event on net carbon uptake of subtropical coniferous plantation in Qianyanzhou. Combining with wavelet analysis, we analyzed environmental controls on net carbon uptake at different temporal scales, when the extreme high temperature and extreme high temperature event happened...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692047/-divergence-between-ring-and-diffuse-porous-wood-types-in-broadleaf-trees-of-changbai-mountains-results-in-substantial-differences-in-hydraulic-traits
#13
Xiao Han Yin, Guang You Hao
Hydraulic characteristics of trees are strongly influenced by their xylem structures. The divergence in wood type between ring-porous and diffuse-porous species is expected to lead to significantly different hydraulic architecture between these two functional groups. However, there is a lack of comprehensive comparative studies in hydraulic traits between the two groups, in that no study has compared the whole-shoot level hydraulic conductance and detailed pit-level xylem anatomy has not been reported yet. In the present study, detailed hydraulic related traits were stu-died in three ring-porous and four diffuse-porous tree species commonly found in the broadleaf tree species of the Changbai Mountains, including whole-shoot hydraulic conductance (Kshoot ), resis-tance to drought-induced embolism (P50 ), and detailed tissue- and pit-level anatomical characteristics...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692038/-interannual-changes-in-fish-community-structure-in-the-northern-part-of-the-coastal-waters-of-jiangsu-province-china-in-spring
#14
Jia Wo, Xiu Xia Mou, Bin Duo Xu, Ying Xue, Chong Liang Zhang, Yi Ping Ren
Based on the data collected from the bottom trawl surveys in the coastal waters of northern Jiangsu Province from 2009 to 2014, multivariate statistical analysis and other integrated indices were used to analyze the variation in the community structure of fish assemblage over time in the waters. The results showed that 68 species had been caught in the coastal waters of northern Jiangsu Province. There were significant fluctuations in the relative density of fish resources. The mean catch mass per site ranged from 0...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692037/-characterization-of-cadmium-uptake-kinetics-in-cadmium-pollution-safe-rice-material
#15
Jing Yi Guo, Man Zhang, Xi Zhou Zhang, Ting Xuan Li, Lu Zhang, Fu Huang, Dong Ming Chen, Xian Ming Sun
The characteristics of cadmium (Cd) uptake kinetics in a pollution-safe rice variety of D62B were studied in a hydroponic experiment under different Cd levels and stress time, with a common variety Luhui17 as the control. The results showed that Cd uptake in root of D62B was significantly lower than that of Luhui17 under different stress times. The differences in Cd uptake of the two rice varieties increased with the extension of absorption time. Total Cd amount of Luhui17 was 1.3 times as much as that of D62B when the absorption time was 72 h...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692031/-exogenous-no-application-effectively-alleviates-the-allelochemical-stress-on-cucumber-root-border-cells-caused-by-eupatorium-adenophorum-extracts
#16
Xiao Huan Yang, Wen Xiu Yang, Liang Liang Sun, Qian Zhao, Yong Heng Cao, Jin Hu Ma
Using suspension cultures of cucumber (Cucumis sativus) cultivar Jinyou 35, we investigated the effects of allelochemical stresses induced by Eupatorium adenophorum extracts on root border cells (RBC), and the role of exogenous NO application in alleviation of the damage of root tips exposed to E. adenophorum extracts. The results showed that, 1000 mg·L-1 E. adenophorum extracts had significant damage to the cucumber root tip, resulting in severe tissue damage, exfoliated surface cells and irregular arrangement of inner cells, while those damages could be effectively alleviated by spraying exogenous NO...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692030/-effects-of-diverse-stresses-on-gene-expression-and-enzyme-activity-of-glutathione-reductase-in-brassica-campestris
#17
Teng Guo Zhang, Ting Ting Nie, Wan Cang Sun, Zhong Fei Shi, Juan Wang
A novel glutathione reductase gene (GR2) was isolated from Brassica campestris Longyou 6 by rapid isolation of cDNA ends (RACE). The full-length of cDNA of GR2 was 2073 bp, with an open reading frame (ORF) of 1692 bp. GR2 encoded a protein of 563 amino acids with a deduced molecular mass of about 60.7 kDa and an isoelectric point of 7.9. The real-time quantitative PCR results showed that GR2 was expressed in the roots, stems and leaves in B. campestris, among which the expression of GR2 in leaves was the highest...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692028/-effects-of-light-intensity-on-photosynthetic-capacity-and-light-energy-allocation-in-panax-notoginseng
#18
Xiang Zeng Xu, Jin Yan Zhang, Guang Hui Zhang, Guang Qiang Long, Sheng Chao Yang, Zhong Jian Chen, Fu Gang Wei, Jun Wen Chen
To explore the effects of light intensity on photosynthetic characteristics and light adaptation of the shade-demanding species Panax notoginseng, the responses of photosynthesis to photosynthetic photon flux density, CO2 and sunflecks in the two-year-old Panax notoginseng were investigated under different levels of light intensity (29.8%, 9.6%, 5.0%, 1.4% and 0.2% of full sunlight). Meanwhile, chlorophyll a fluorescence parameter and light energy partitioning were also recorded and calculated in the responsive process...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692027/-effects-of-extremely-late-sowing-on-the-grain-yield-nitrogen-uptake-and-utilization-and-grain-protein-content-in-winter-wheat
#19
Jin Zhi Wu, Ming Huang, Zhi Min Wang, You Jun Li, Guo Zhan Fu, Ming Can Chen
In order to explore the cultivation techniques for high yield, quality and nitrogen use efficiency of wheat and guide the production practice of late sowing, a two-year experiment of different sowing times and plant densities in fixed plots was conducted from October 2012 to June 2014. Weak-spring cultivar of Yanzhan4110 (YZ4110) and semi-winter cultivar of Aikang58 (AK58) were sowed with two cropping patterns: Normal sowing (sowing in the middle of October, 2.4×106 plants·hm-2 ) and extremely-late sowing (sowing in the middle of November, 6...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692020/-impact-of-low-temperature-in-young-ear-formation-stage-on-rice-seed-setting
#20
Shu Qing Ma, Xiao Hang Liu, Kui Cai Deng, Hu Jie Quan, Li Yuan Tong, Zhu Xiang Xi, Qing Rong Chai, Jun Yang
A low temperature treatment in rice booting key period was executed on the north slope of Changbai Mountains to construct the impact model of low temperature on rice shell rate, and to reveal the effects of low temperature at different stages of rice young panicle on seed setting. The results showed that effects of low temperature in the young ear formation stage on rice shell rate generally followed the logarithmic function, the lower the temperature was, the greater the temperature influence coefficient was, and the longer the low temperature duration was, the higher rice shell rate was...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
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