缓控释氮肥种类和用量对南方粳稻产量和收益的影响

摘要

In order to define the reasonable type and amounts of slow-release nitrogen fertilizer on japonica rice in Southern hillside area, the authors analysised the yield and fertilizer use efficency of two kinds of slow-release nitrogen fertilizer with different coating materials(resin coated urea and water-soluble polymer coated urea), and assessed the inputs and benefits of different treatments, tak-ing common urea as control. The results showed that slow-release fertilizer significantly increased rice yield, agronomic efficiency and economic benefit, compared with common urea. The water soluble polymer coated urea is a better kind of slow-release fertilizer in Southern hillside area, and the best application amount was 195 kg/hm 2.%为探明南方丘陵区粳稻种植中适宜的缓控释氮肥种类和合理的用量，本研究以普通尿素为对照，分析比较了2种包膜尿素（树脂包膜尿素和水溶性聚合物包膜尿素）不同用量下粳稻产量和肥料利用率的变化，并结合成本投入评估了不同处理的收益。结果表明，与普通尿素相比，施用缓控释肥显著提高了南方丘陵区粳稻产量、氮肥农学效率和收益，其中水溶性聚合物包膜尿素是较好的缓控释肥种类，适宜用量为195 kg/hm2（纯N）。