By Wen Qi-Xiao (auth.), Zhao-liang Zhu, Qi-xiao Wen, J. R. Freney (eds.)
The research of soil nitrogen has lengthy been an lively box, however it used to be ordinarily pivoted on agricultural and forestry construction, and animal husbandry. With the speedy raise within the use of fertilizer nitrogen, extra realization has been paid to the rela tionship among nitrogen administration and environmental caliber and human of soil nitrogen has develop into extra complete with healthiness. furthermore, the examine the improvement of similar sciences. The quantitative examine of the strategies in nitrogen biking and their interrelationships has been an immense a part of this venture and has attracted the eye of scientists allover the area. Nitrogen is without doubt one of the most crucial meals for plant progress and the applica tion of fertilizer nitrogen is taking part in an enormous function in agricultural creation. the once a year intake of fertilizer nitrogen on the planet has reached 70 million plenty, and China has an annual intake of greater than 15 million plenty and is the most important fertilizer nitrogen customer on this planet. besides the fact that, the potency of nitro gen fertilizer is low and losses are huge. it's expected that nitrogen losses from agriculture in our kingdom may be as excessive as 40-60% of the nitrogen utilized. a number of the misplaced nitrogen enters the ambience and contributes to the greenhouse impact and a few enters water our bodies to pollute the water.
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Extra resources for Nitrogen in Soils of China
Sample text
Elucidation of the nitrogen forms in melanoidins and humic acid by nitrogen-15 cross polarization-magic angle spinning nuclear magnetic resonance spectroscopy. 1. Agric. Food Chern. 31:913-915. 28 Wen Qi-xiao Benzing-Purdie, L, Cheshire, M V, Williams, B L, Sparling, G P, Ratcliffe, C I and Ripmeester, J A 1986. Fate of glycine in peat as determined by l3C and ISN CP-MAS NMR spectroscopy. J. Agric. Food Chern. 34: 170-176. Biederbeck, V 0 and Paul, E A 1973. Fractionation of soil humate with phenolic solvents and purification of the nitrogen rich portion with polyvinylpyrrolidone.
J. Soil Sci. 56:43-50. Riga, A, Van Praage, H J and Brigode, N 1971. Natural abundance of nitrogen isotopes in certain Belgium forest and agricultural soils under certain cultural treatments. Geoderma 6:213-222. Shearer, G and Legg, J 01975. Variations in the natural abundance'of 15 N of wheat plants in relation to fertilizer nitrogen applications. Soil Sci. Soc. Am. Proc. 39:896-90l. Shi, S L, Wen, Q X and Liao, H Q 1987. Contents of fixed ammonium in the main soils of China. (in Chinese). Soils 19:79-83.
Soil Survey and Agricultural Development. (in Chinese). Wen, Q X and Lin, X X 1983. Content and characteristics of organic matter in red soil region of China. ), Red Soils in China. pp. 119-127. Science Press, Beijing. 30 Wen Qi-xiao Wu, G Y 1986. The effect of organic manure on the nitrogen fertility of meadow black soil. (in Chinese). Chin. J. Soil Sci. 17:85-88. XU, Q, Lu, Y C, Liu, Y C and Zhu, H G 1980. The Paddy Soil of Taihu Region in China. (in Chinese). Shanghai Scientific and Technical Publishers, Shanghai, China.