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本文测定了几个早籼和晚粳良种抽穗期的伤流强度,观察了早籼抽穗期后伤流强度的动态变化,并研究了若干因素对伤流强度的影响。每穴插单本,供试各品种在抽穗期测定,每株每小时的伤流量均在1,000mg 以上。抽穗期后伤流强度逐渐下降,开始比较缓慢,至灌浆后期转剧。试验表明,水稻伤流强度因品种、生育期,每株蘖数、测定持续时间、所留叶片的蒸腾作用及水、肥、温度等环境因素的不同而变化。其中以所留部分茎蘖产生的蒸腾作用的影响尤为严重,导致伤流强度锐降。延长测定时间,落干水层、降低土温都可以降低伤流强度,氮肥能促进伤流液的分泌。增加每株蘖数也有提高整株伤流强度的作用。
In this paper, the wounding intensity at heading stage of several indica rice and late japonica hybrid rice was measured. The dynamic changes of wound bleeding intensity after heading stage were observed. The effects of several factors on the wound bleeding intensity were also studied. Each hole inserted single, for testing various varieties at heading, each wound injury per hour are above 1,000mg. Injury intensity gradually decreased after heading, began relatively slowly, to the late filling turnaround. The results showed that the injury intensity of rice varied with different environmental factors such as variety, growth period, tiller number per plant, duration of measurement, the transpiration of retained leaves and water, fertilizer and temperature. Among them, the effect of transpiration caused by the remaining part of stems and tillers was particularly serious, leading to a sharp drop in the strength of the wounds. Extend the determination of time, dry the water layer, reduce soil temperature can reduce the wound strength, nitrogen fertilizer can promote the secretion of fluid injury. Increasing the number of tillers per plant also has the effect of increasing the strength of the whole wound.