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限制供给每个葡萄穗光合产物的叶面积,通过减小平均浆果重而使平均穗重降低。叶面积减小后的植株上,浆果生长较慢,且达不到叶面积较多的植株上的浆果体积。达到成熟(16°白利糖度)的时间也受植株叶面积减少的影响;糖的积累和可滴定酸度的减少都受抑制。两个极端处理之间记载的采收期相差一个月以上。在本试验中,“意大利”(Italia)葡萄每克果需要7.2cm~2到9.5cm~2叶面积以促进适宜的成熟。
Limiting the leaf area per panicle supplied photosynthate, the average panicle weight is reduced by reducing the average berry weight. On the reduced leaf area, the berries grew slowly and did not reach the volume of berries on the plants with more leaf area. The time to maturity (16 ° Brix) was also affected by the reduction of plant leaf area; the accumulation of sugars and the decrease of titratable acidity were inhibited. The difference between harvested periods recorded between the two extreme treatments is more than one month. In this test, “Italia” grapes require 7.2 cm -2 to 9.5 cm -2 leaf area per gram of fruit to promote proper maturity.