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对科棉 1号不同密度氮肥组合效应的研究结果表明 ,公顷总铃、产量与密度符合抛物线回归 ,回归曲线显示 ,在 30 0～375kg·hm- 2 纯氮下 ,密度在 3 75～ 4 0 5万株·hm- 2 范围内有极大值。研究结果同时显示 ,皮棉产量与总有效果节量呈显著正相关 ,提高总有效果节量和成铃率是实现高产栽培的主要技术途径。达到 1 650kg·hm- 2 产量水平的生育指标 ,株高 1 2 0cm ,总果枝90万·hm- 2 ,总有效果节量 30 0万·hm- 2 ,总桃 90万·hm- 2 。
The results showed that the total bolls yield and density conformed to the parabolic regression model. The regression curves showed that the density of the total nitrogen at 30 0 ~ 375 kg · hm-2 was in the range of 3 75 ~ 40 50,000 units · hm-2 range has a maximum value. The results also showed that there was a significant positive correlation between the lint yield and the total effective yield, and the total effective yield and boll rate were the main technical ways to achieve high yield cultivation. The fertility index reached a level of 1 650kg · hm-2. The plant height was 120cm, the total fruit shoots were 900,000 · hm-2, the total effective fruit weight was 30,000 · hm-2 and the total peach was 900,000 · hm-2.