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[1]HE Tie-guang,QIN Fang,SU Tian-ming,et al.Effect of Different Cultivation Methods on Nitrogen and Phosphorus Losses along with Runoff[J].Research of Soil and Water Conservation,2014,21(01):95-99,103.

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Effect of Different Cultivation Methods on Nitrogen and Phosphorus Losses along with Runoff

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 01 Page number: 95-99,103 Column: Public date: 2014-02-28

Title:: Effect of Different Cultivation Methods on Nitrogen and Phosphorus Losses along with Runoff

Author(s):: HE Tie-guang, QIN Fang, SU Tian-ming, SU Li-rong, ZHANG Ye, HE Yong-qun, LI Zhong-yi, HU Jun-ming, XIE Li-ping; Agricultural Resources and Environment Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China

Keywords:: maize; planting model; nutrient; runoff

CLC:: S152.4

DOI:: -

Abstract:: In order to optimize cropping pattern of increasing fertilizer use efficiency, decrease nutrient loss and reduce environmental pollution, the field experiment was conducted to study the characteristics of slope farmland nutrient losses along with runoff in the main cash crop fields under the conventional fertilization practiced by farmers and major cropping patterns in Guangxi hilly sloping land. The results showed that loss amount of total phosphorus, total potassium and nitrate were maximum in cassava+maize mode, followed by loss amount of total nitrogen, ammonium nitrogen. The loss amount of the remaining nutrients was less except for the total phosphorus (245.1 g/hm), and the loss of nitrate nitrogen was the main loss form of nitrogen, which accounted for more than 50% of the total lost nitrogen. The maximum runoff was 60 974 L/hm² in the cassava+peanut model, the next was 58 583 L/hm² in sugarcane mode, and the least was 52 676 L/hm² in cassava+maize model. The amounts of the crop absorbing nitrogen, phosphorus and potassium were the most in cassava+maize model on July 13, Also the amounts of the nitrogen, phosphorus and potassium uptake by sugar cane were the most in sugar cane model on November 13. The amount of applying fertilizer of 3 cropping models was the highest in cassava+maize mode, higher in cassava+nut mode, but the least in sugar cane model. The runoff rate of nitrogen and phosphorus of 3 planting models was the highest in sugar cane model. The runoff rate of potassium of 3 planting models was the highest in cassava+maize model.

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