Fertilization and Run-off Loss of Nutrient of Major Economic Crops in Sloping Farmland of Guangxi Province, China

• Main Authors: HE Tie-guang, QIN Fang, SU Li-rong, SU Tian-ming, ZHANG Ye, HE Yong-qun, HU Jun-ming, LI Zhong-yi, WEI Cai-hui, LI Ting-ting
• Format: Article
• Language: zho
• Published: Agro-Environmental Protection Institute, Ministry of Agriculture 2014-04-01
• Series: Journal of Agricultural Resources and Environment
• Subjects: Nutrient; runoff; fertilization; loss; economic crop
• Online Access: http://www.aed.org.cn/nyzyyhjxb/html/2014/2/20140212.htm
• ISSN: 2095-6819; 2095-6819

To seek the optimum fenilizion for improving economic efficiency of Guangxi crops,reducing costs of production and reducing en-vironmental pollution,the effects of different fertilizer on growth, yield and nutrient runoff losses of major economic crops (sugarcane, maizeand peanut)were studied in sloping farmland of Guangxi Province. Run-off loss of nutrient was determined in precipitation process in slopingfarmland, cultivation methods of low cost and high efficiency were sought by using SPSS statistical analysis software. The results showed thatthere was not significant difference on growth of sugarcane (maize, peanut) between control and conventional fertilization. The economic out-put, biomass production, starch of maize in control were 851.42 kg·667 m-2 3 640.40 kg·667 m-2 68.40% respectively, which were higher100.62 kg·667 m -2 485.98 kg·667 m -2, 7.5% than those of maize in conventional fertilization. The fat of peanut ( contrast )was higher 45 g·kg-1 than those of conventional fertilization. The runoff loss of total nitrogen, total phosphorus, total potassium, nitrate and ammonium nitro-gen was all the highest in peanut conventional fertilization, higher in sugar cane contrast, the least in maize contrast; Correlation coefficientsbetween runoff and total nitrogen, total phosphorus, total potassium, nitrate and ammonium nitrogen, for the conventional fertilization werehigher than that for the contrast of three crops. Total nutrient runoff losses of the maize contrast was the least, and nutrient runoff rate of thepeanut conventional fertilization was the largest. So maize was suitable for planting than peanut in sloping land of Guangxi Province.