نتایج جستجو برای: microbiological fertilizer

تعداد نتایج: 40168  

2015
Zengqiang Li Bingzi Zhao Qingyun Wang Xiaoyan Cao Jiabao Zhang

Chemical composition of soil organic carbon (SOC) is central to soil fertility. We hypothesize that change in SOC content resulting from various long-term fertilization strategies accompanies the shift in SOC chemical structure. This study examined the effect of fertilization strategies along with the time of fertilizer application on the SOC composition by 13C nuclear magnetic resonance (NMR) ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2013
Wei-Feng Zhang Zheng-Xia Dou Pan He Xiao-Tang Ju David Powlson Dave Chadwick David Norse Yue-Lai Lu Ying Zhang Liang Wu Xin-Ping Chen Kenneth G Cassman Fu-Suo Zhang

Synthetic nitrogen (N) fertilizer has played a key role in enhancing food production and keeping half of the world's population adequately fed. However, decades of N fertilizer overuse in many parts of the world have contributed to soil, water, and air pollution; reducing excessive N losses and emissions is a central environmental challenge in the 21st century. China's participation is essentia...

2010
Ram Krishna Shrestha

Fertilizer is a vital input for agriculture production. With the growing popularity of modern agriculture, fertilizer consumption in Nepal has been increasing over the years. Since, Nepal does not produce any fertilizers, demand for fertilizers are being met through formal and informal imports. Over the years, fertilizer policy changes have been observed several times in a bid to satisfy farmer...

Journal: :Journal of environmental sciences 2012
Yuanyuan Zhang Junfeng Liu Yujing Mu Zhu Xu Shuwei Pei Xiaoxiu Lun Ying Zhang

Nitrous oxide (N2O) emissions from a maize field in the North China Plain (Wangdu County, Hebei Province, China) were investigated using static chambers during two consecutive maize growing seasons in the 2008 and 2009. The N2O pulse emissions occurred with duration of about 10 days after basal and additional fertilizer applications in the both years. The average N20 fluxes from the CK (control...

2000
K. P. Paudel L. Lohr

Peanut and corn are two major crops in the tri-state area of the southeast USA, an area encompassing north Florida, southwest Georgia, and southeast Alabama. Sharecroppers in this region apply higher amount of input in crop production than the average farmers. We analyzed the behavior of sharecroppers in this region with regard to their fertilizer application decisions. Two hypotheses were form...

2008
P. A. Vadas A. N. Sharpley

Dissolved phosphorus (P) in runoff from surface-applied fertilizers can be relatively great, but commonly used, field or watershed-scale computer models often do not simulate direct transfer of fertilizer P to runoff. Using data from our own simulated rainfall experiments and published runoff studies, we developed a simplemodel to predict fertilizer P release during rain and the concentration o...

2006
Silvina I. Portela Adrián E. Andriulo Esteban G. Jobbágy

Nitrogen (N) export from soils to streams and groundwater under the intensifying cropping schemes of the Pampas is modest compared to intensively cultivated basins of Europe and North America; however, a slow N enrichment of water resources has been suggested. We (1) analyzed the fate of fertilizer N and (2) evaluated the contribution of fertilizer and soil organic matter (SOM) to N leaching un...

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