摘要
选用优质中粳“苏沪香粳”作瓜茬晚稻栽培,进行栽植密度和施氮量二因子试验,结果表明:栽植足量的基本苗是瓜茬晚稻足穗高产的基础;在单位面积施N8kg/666.7m2基础上增施氮肥,对少苗处理有一定增产效果,但对足苗处理反致穗重下降而减产。非线性回归分析表明,在栽足基本苗16万/666.7m2基础上,适量施N5kg左右,能获得高产、节本效果。
A good mid-season keng rice 'Suhuxiangjing' was used as a tested material of late rice culture following watermelon and the two factor experiments of planting density and amount of applied N fertilizer were carried out. The results showed that adequate number of basic seedlings per unit area was a grounding in reaching adequate ears and high yield, and increasing amount of applied N fertilizer on the basic of applying 8 kg N fertilizer per 666.7m^2 had some effect on improving yield under inadequate basic seedlings, but under adequate basic seedlings doing so could make grain weight per ear decrease and reduce yield. The non-linear regression analysis showed that applying N fertilizer 5kg/666.7m^2 under planting basic seedlings 16×10~4/666.7m^2 could obtain a high yield and save costs.
出处
《上海农业学报》
CSCD
2005年第2期40-44,共5页
Acta Agriculturae Shanghai
关键词
西瓜茬
晚稻
栽植密度
施氮量
非线性回归分析
产量
Late rice following watermelon
Planting density
Amount of applied nitrogen fertilizer
Regression analysis
