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棉花打顶,究竟以在什么时候进行为好?各地干群的看法不同。我局曾在1958年11月底召集各地农业技术人员座谈这个问题。下面是座谈的初步结论,仅供参考。 据张港农场1957年试验,以8月3日打顶为好。1958年在同一块田里进行每隔五天打一次顶的试验,其结果:8月27日打顶的产量比8月9日打顶的高8%;比9月8日打顶的又高19%。渔薪等地群众认为,由于1958年秋后追肥多,在当年的温度,土壤等条件下,以处暑到处暑以后几天打顶为适,而中等肥田,以处暑前几天打顶为适,个别瘦田还是在立秋后不远或立秋打顶为好。 从棉株最上部的空果枝来看,打顶过迟的其空果枝多些。张港公社8月21日打顶的有空果枝3.1个,8月27日打顶的有空果枝4.1个。这说明适时打顶,可以把长空果枝的养料用来长桃子,以增加产量。
Cotton topping, what exactly is carried out at what time? At the end of November 1958, our bureau called a meeting of agricultural technicians from all over the country to discuss this issue. The following is the initial conclusion of the discussion, for reference purposes only. According to Zhang Hong farm experiment in 1957 to August 3 topping as well. In 1958 in the same field once every five days hit the top of the test, the result: August 27 topping than the top 8 August topping 8% higher than the September 8 topping 19% higher. In the opinion of the masses such as the fishermen’s wage, since the fall of 1958, top dressing, in the current year’s temperature, soil and other conditions, to summer heat to a few days after the summer topping as appropriate, and moderate fertilizer field, Individual thin field or not far after the beginning of autumn or the beginning of autumn topping as well. From the top of the cotton plant empty fruit branch point of view, topping too late empty fruit branch more. Zhanggang commune on August 21 topping the empty fruit branch 3.1, August 27 topping the empty fruit branch 4.1. This shows timely hit topping, you can use the long-nourishing fruit nourishment for long peaches, in order to increase production.