增加了群体内光照强度,且使光分布趋于合理,这是稀植化栽培群体最主要的特点。例如1986年齐穗期对不同密度群体内光分布进行分层测定表明(表6),密度越小,群体中、下部光分布量越多,这为延长中下部叶片寿命、减慢光合层向上推移速度、增强光合层机能提供了条件,同时也可能为增强横向生长创造良好的有机营养(碳素营养)基础。 Increase the light intensity within the population, and to make the light distribution tends to be reasonable, which is the most important feature of the cultivation of rare plants. For example, stratification of light distribution in different density groups at full heading stage in 1986 showed that (Table 6), the smaller the density, the more the light distribution in the lower and middle populations, which prolongs the life of the middle and lower leaves and slows down the photosynthetic layer upward The speed of migration, the enhancement of photosynthetic layer function, and the possibility of creating good organic nutrition (carbon nutrition) foundation for enhancing lateral growth.