施氮量和栽插密度对郑稻18产量及其构成因素的影响

摘 要：以郑稻18为试验材料，研究了施氮量和栽插密度对其产量及其构成因素的影响。施氮量设置4个水平，分别为0kg?hm-2（N0）、150kg?hm-2（N1）、225kg?hm-2（N2）、300kg?hm-2（N3）；栽插密度设置3个水平，分别为18.0×104hm-2（B1）、24.0×104hm-2（B2）、30.0×104hm-2（B3）。结果表明：（1）施氮量、栽插密度对郑稻18的产量均有显著影响。N3产量水平最高，N2产量与之相当，且较N1、N0增产均达显著水平；栽插密度B3产量最高，较B2、B1增产均达显著水平。（2）施氮量及栽插密度对产量构成因素有着不同的影响，其中对单位面积穗数影响最大，每穗粒数次之，结实率、千粒重相对较小。（3）施氮量与栽插密度的12个处理组合中，N2B3最为环保高效。

Effects of amount of nitrogen applied and planting density on yield and its components of zhengdao 18

The effects of nitrogen application and planting density on yield and its components of zhengdao 18 were studied. Designing four nitrogen applications of 0 kg/hm2, 150 kg/hm2, 225 kg/hm2 and 300 kg/hm2, designing three transplanting densities of 18.0×104 holes/hm2, 24.0×104 holes/hm2 and 30.0×104 holes/hm2. The results are as follows： The effects of amount of nitrogen applied and planting density on yield of zhengdao 18 were obvious; the yield of N3 was tiptop, and the yield of N2 was equivalent with N3, both were significantly increased with the yield of N1 and N0. The yield of B3 was tiptop, and it was increased significantly with the yield of B2 and B1. There were different function of yield components with different amount of nitrogen and planting density, the effect on panicles per unit area was most serious, the next to grains per panicle, on seed setting rate and 1000-grain weight were the least. N2B3 was the best of twelve treatment combinations in environment conservation and efficient.