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对西瓜不同品种、不同密度的干物质和叶面积增长动态及其与光合因素的关系进行了研究.结果表明,干物质及叶面积迅速增长期(直线增长期)约在开花前后10d左右,是栽培管理上应特别注意的时期.最适栽植密度为1000—1100株·666.7m~(-2),在此密度下,到达临界叶面积指数(0.9829)时间最短,且最大叶面积指数值最高.每666.7m~2产量4000kg以上的田块,每666.7m~2光合势应达20000m~2·d~(-1)以上,且膨瓜期的光合势占总光合势的2/3以上.
The dynamic changes of dry matter and leaf area of different varieties and densities of watermelon and its relationship with photosynthetic factors were studied.The results showed that the rapid growth period (linear growth period) of dry matter and leaf area was about 10 days before and after flowering In the period of cultivation and management, special attention should be paid to the optimum planting density of 1000-1100 plants · 666.7m -2, at which the critical leaf area index (0.9829) reached the minimum and the maximum leaf area index The field photosynthesis potential of 666.7m ~ 2 per 666.7m ~ 2 should be more than 20000m ~ 2 · d ~ (-1) per 666.7m ~ 2 field, and the photosynthetic potential in bulking stage accounts for more than 2/3 of the total photosynthetic potential .