Effect of Different Irrigation Maximums on Accumulation and Distribution of Material in Chinese Kale.

[Objective] The aim was to explore effects of soil moisture on dry matter accumulation and distribution and growth of kai-lan. [Method] In the context of the same irrigation frequency, the influence of irrigation maximum was researched on growth rate, net assimilation rate, and dry matter distribution of kai-lan. [Result] The results showed that regulation on soil moisture extremely significantly affected accumulation of photosynthate. When soil moisture was insufficient, the growth term from seedling to mature extended and growth rate declined sharply. Besides, the growth term was of extremely significant negative correlation with growth rate. Meanwhile, leaf assimilation rate decreased considerably. For example, when soil moisture was 65%, distribution of dry matter in plant organs tended to be rational. [Conclusion] Deficit irrigation would significantly lower growth rate, and improve dry matter distribution in organs and economic yield and quality of kai-lan. [ABSTRACT FROM AUTHOR]