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[1]QIN Fang,HE Tieguang,SU Lirong,et al.Study on Runoff and Nutrient Losses of Soils on Sloping Land in Wet Season in Southern China[J].Research of Soil and Water Conservation,2016,23(02):19-22,27.

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Study on Runoff and Nutrient Losses of Soils on Sloping Land in Wet Season in Southern China

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 02 Page number: 19-22,27 Column: Public date: 2016-04-28

Title:: Study on Runoff and Nutrient Losses of Soils on Sloping Land in Wet Season in Southern China

Author(s):: QIN Fang, HE Tieguang, SU Lirong, SU Tianming, ZHANG Ye, LI Tingting, LI Qin, WEI Caihui, LI Zhongyi, YU Yuefeng; Agricultural Resources and Environment Research Institute, Guangxi Academy of Agriculural Sciences, Nanning 530007, China

Keywords:: nutrient; runoff; fertilization; sugarcane leaf cover

CLC:: S152.4

DOI:: -

Abstract:: An experiment on runoff plots on dry slope in Guangxi was conducted to investigate the effects of different fertilization treatments and planting management modes on runoff amount/loss rate of N,P,K and nutrient use efficiency, and screen a planting management mode with low nutrient loss rate and high nutrient use efficiency. The results showed that the greatest loss amounts of runoff, total nitrogen, ammonium nitrogen, total phosphorus and total potassium in (CK) treatment were 724.65 t/hm², 3.70 kg/hm², 1.26 kg/hm²,0.62 kg/hm², 3.36 kg/hm², respectively, which were much higher than those in the other treatments. Compared with (SF) treatment, the runoff losses of N, P, K in (SF60%), (SF+H), (SF+T+H) treatments reduced. Lower N, P, K loss rates were 82.54%, 64.29%, 20.00%, respectively, and N, P, K use efficiencies of in (SF+H) treatment were 56.73%, 38.78%, 7.87% higher than those in (SF) treatment. A negative significant partial correlation was found between runoff, ammonium and the total investment of N fertilizer, P fertilizer, K fertilizer. Compared with (SF) treatment, the amount and rate of nutrient runoff loss in (SF+H) treatment and (SF+T+H)treatment declined, also improved for nutrient use efficiency of sugarcane, so two kinds of management patterns were suitable for dry slope land of southern China promotion.

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