The Research On Arid Mountain Film Potato Slow Release Nitrogen Fertilizer Uptake and Transport
[Objective] The aim was to explore reasonable fertilization for film covering potato in plateau arid mountain,reducing nitrogen leaching caused by environmental risks.[Method] Eight fertilizer treatments were set to study the effects of different fertilization treatment on plateau arid mountain potato field production,nitrogen absorption of plant samples,distribution,and nitrate and ammonium nitrogen content in soil leaching solution.[Results] Comparing the application of the slow release nitrogen fertilizer and the ordinary nitrogen fertilizer with same amount of nutrients such as nitrogen,the increased rates of yield were 10.6％,17.4％ ; with the advance of potato growing period,the nitrogen content in potato organs presented a gradually declining trend,in which the decrease of nitrogen content in leaves was large,and in the reproductive growth stage 80 days' slow release nitrogen fertilizer is more helpful to the transfer of nitrogen from stem to the potato leaves than the ordinary urea and 50 days' slow release nitrogen fertilizer.The amount of nitrogen accumulation of 50 days' slow release nitrogen fertilizer in the enlargement stage was higher than that of other treatments,which compared to the control,OPT were higher by 88％,68％.The demand of potato for nitrogen was almost same as the release law of 50 days' slow release nitrogen fertilizer.The decrease trend of other organs was more gentle.[Conclusion] Slow release nitrogen fertilizer could delay the transformation rates of nitrogen to nitrate nitrogenthe in the entire growth period of potato to ensure long-term,continuing to provide the plant with nutrients nitrogen,thereby increasing the yield of potato.
Plastic film mulchingRidge tillage plantingPotatoesSlow-release urea
国家科技期刊平台
NSTL
万方数据
维普
