Response of cotton fruit growth, intraspecific competition and yield to plant density

文献类型： 外文期刊

第一作者： Li, Xiaofei

作者： Li, Xiaofei;Han, Yingchun;Wang, Guoping;Feng, Lu;Wang, Zhanbiao;Yang, Beifang;Du, Wenli;Lei, Yaping;Xiong, Shiwu;Zhi, Xiaoyu;Xing, Fangfang;Fan, Zhengyi;Xin, Minghua;Li, Yabing

作者机构：

关键词： Beta growth function; Cotton; Plant density; Intraspecific competition; Yield

期刊名称：EUROPEAN JOURNAL OF AGRONOMY （ 影响因子：5.124； 五年影响因子：5.567 ）

ISSN： 1161-0301

年卷期： 2020 年 114 卷

页码：

收录情况： SCI

摘要： Increasing plant density has been an effective way for cotton yield improvements. The density of plants in a community also determines competition intensity and the efficiency to exploit available resources. However, the competition response as well as optimal density for yields and the mechanisms of which in terms of fruit growth rate are poorly known. A field experiment was conducted on cotton (Gossypium hirsutum L. SCRC 28) at a wide range of plant densities from 1.5-10.5 plants m(-2). The results indicated that intraspecific competition between cotton plants increased nonlinearly with increasing plant density. Seedcotton yield per unit ground area declined precipitously at plant densities below the 4.0 plants m(-2) threshold and yield did not further increase above this threshold, which is interpreted as the minimum plant density at which yield should be maximized. Moreover, maximum fruit production and fruit growth rate were also recorded at the same density threshold, above which there was no significant response. Cotton yield was positively correlated with fruit production and fruit growth rate. We thus conclude that high fruit production and fruit growth rate are responsible for maximum yield under optimal plant density in cotton.

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