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Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (15): 1-6.doi: 10.11924/j.issn.1000-6850.casb14110102

Special Issue: 水稻

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Effects of Different Fertilization on Yield, Nitrogen Absorption and Its Use Efficiency of Rice
in the Northern Agricultural Area of Fuxian Lake

Yang Shaocong1, Lv Yanling1, Mu Chan1, Zhang Yanjun1, Fei Yong2,Shen Wenzhi2, Li Chengchun2, Wang Yong2   

  1. (1Yuxi Academy of Agricultural Sciences, Yuxi Yunnan 653100;2Station for Promotion Agricultural Technology of Chengjiang County, Chengjiang Yunnan 652500)
  • Received:2014-11-17 Revised:2014-11-28 Accepted:2014-12-02 Online:2015-06-02 Published:2015-06-02

Abstract: In the light of effects of excessive residual amount of soil nutrient on succeeding rice fertilization, arising from excessive vegetable fertilization in the northern agricultural area of Fuxian Lake, different fertilization experiments were carried out by field plots. The results showed that nitrogen-accumulation of rice was increased with increasing of nitrogen fertilization (150-360 kg/hm2) in sandy loam and clay loam, and the incremental nitrogen-accumulation was occurred in stem and leaf. The application of nitrogen in panicle fertilizer could increase nitrogen-accumulation of the grain. When applied nitrogen of 255 kg/hm2, nitrogen use efficiency and yield of rice in sandy loam were showing the highest (45.1% and 10594 kg/hm2), when applied nitrogen between 150 kg/hm2 and 360 kg/hm2, nitrogen use efficiency and yield of rice in clay loam were 20.9%-22.4% and 10486-10596 kg/hm2. When applied nitrogen in panicle fertilizer, nitrogen use efficiency and yield of rice were the highest in sandy loam (42.8% and 10445 kg/hm2) and clay loam (23.5% and 10564 kg/hm2). The nitrogen harvest index of rice, nitrogen agronomy efficiency, nitrogen physiological efficiency and nitrogen partial factor productivity in sandy loam were obviously higher than those in clay loam, and these were significantly decreased with increasing of nitrogen fertilization. The appropriate nitrogen fertilization of vegetable succeeding rice was 150-255 kg/hm2, which were applied as base fertilizer (50%), tillering fertilizer (30%) and panicle fertilizer (20%).