摘要
研究了广西旱地甘蔗产量因子的构成特点、相关性及其对产量的效应。结果表明:高产田(75-99t·hm-2)与中产田(45-74.9t·hm-2)及低产田(<45t·hm-2)间的最大差异是茎长,其次是有效茎数,茎径的差异最小;与普通生产大田(63.5t·hm-2)比较,"吨糖田"(119.4t·hm-2)的茎长增长44.7%,茎径增长17.7%,有效茎数则无大差异;茎长、茎径、有效茎数与产量间呈显著正相关,但茎径与有效茎数呈明显负相关,削弱两者对产量的效应;茎长与茎径无明显相关,但与有效茎数呈明显正相关,因此,其最终对产量的相关及贡献均最大。表明在当前栽培条件下,旱地首先要采取各种有效技术措施,从增加株高入手来提高单产。
Traits and correlation of yield components, and their effect on yield were investigated. The results showed that in various yielded field, great differences existed in stalk length and stalk number, only minor difference exited in stalk diameter. Stalk length and stalk diameter in high yielded field were 44.7% and 17.7% more than that in normal field respectively, while stalk number varied little. Stalk length, stalk diameter and stalk number significantly positively correlated with yield, but stalk diameter negtively correlated with stalk number, which weakened their effects on yield. The correlation between stalk length and stalk diameter was not significant, but the correlation between stalk length and stalk number was positive and significant, which leaded to their greatest contribution to yield.
