陕南优质油菜丰产栽培技术研究

Study on the Fertile Cultural Practices for Brassica napus L. in South of Shaanxi Province

通过不同密度和肥料试验研究表明 ,秦优七号优质杂交油菜新品种在陕南生态区的最佳种植密度为10 .5万株 /hm2 ,同时在合理配施氮磷钾肥料的基础上 ,应将补钾放在首位。应以配施 K2 O112 .5 kg/hm2 (折合 KCl 2 2 5 kg/hm2 为宜 ) ,氮肥用量视地块而定 ,偏瘦地块可补氮 ( N) 2 76kg/hm2 (折合尿素 60 0 kg/hm2 ) ,一般地块施氮 138kg/hm2 (折合尿素 30 0 kg/hm2 ) ,P2 O5用量一般为 N用量的 30 %～ 5 0 %。通过方差分析和双标图分析的比较 ,可以看出双标图分析不仅可以找出各处理的主次效应 ,而且可以找出各指标之间的相互关系。虽然方差分析也可以达到此目的 ,但不如双标图直观 ,尤其是数据集大时 。

The results of different density and fertiliser trials showed that 105 thousand plants per hectare was the best density for Brassica napus in south of Shaanxi province. Kalium was the first complement in all fertiliser, and K_2O 112.5 kg/hm^2 (KCl 225 kg/hm^2) should be used. In this district different farm land should replenish different fertilizer. In fertile land should add nitrogen(N)276 kg/hm^2 (urea 600 kg/hm^2), and normal land should add N 138 kg/hm^2 (urea 300 kg/hm^2). The quantity of P_2O_5 was as more as 30%~50% of nitrogen. Biplot analysis was appropriate and convenient comparing with variance analysis, especially in a quantity of data aggregations.