摘要
田间试验结果表明,施氮量在0—225kg/hm^2的范围内,机插早稻的单位面积产量与施氮量呈二次函数关系,其关系式为Y=-0.0742x^2+28.979x+4068.3,即当施氮量为195.3kg/hm^2时,单位面积产量最高。与习惯施肥方法(基肥:蘖肥:穗肥=7:3:0)相比,适当增加分蘖肥的施用比例,有利于机插早稻产量的提高,在大田总施氮量为180kg/hm^2的条件下,施用比例以基肥:分蘖肥:穗肥为4:5:1或5:4:1的运筹方式为佳。。
The result of field experiment showed that the unit area yield (y) appeared a quadratic curve relation (y = -0.0742x^2 + 28. 979x +4068.3) with the application rate of nitrogen fertilizer (x) in the range of 0 - 225 kg/hm^2 for mechanically- transplanted early rice. There was the highest unit area yield when the application rate of nitrogen fertilizer was 195.3 kg/hm^2. Compared with the traditional nitrogen fertilizer application mode ( basal fertilizer: tillering fertilizer: earing fertilizer = 7: 3: 0), properly increasing the proportion of tillering fertilizer could enhance the yield of mechanically - transplanted early rice. Under the condition of applying 180 kg/hm^2 nitrogen fertilizer, the better application mode of nitrogen fertilizer was basal fertilizer: tillering fertilizer: earing fertilizer =4:5 : 1 or basal fertilizer: tillering fertilizer: earing fertilizer = 5:4: 1.
出处
《江西农业学报》
CAS
2010年第1期37-39,共3页
Acta Agriculturae Jiangxi
基金
浙江省温州市2007年度科技项目(N20070004)
浙江省苍南县2009年科技计划项目(2009N02)
关键词
早稻
机插
氮肥用量
氮肥运筹方式
产量
Early rice
Transplanting by machine
Nitrogen fertilizer dosage
Nitrogen application mode
Yield