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自从杂交稻繁殖制种应用九二○以来,九二○施用量日趋增大。最初每亩1～2克,继而是5～6克。目前,大面积普遍用到13～14克,有的竟用到了20克以上。用量的猛增,价格的上涨,既给生产厂家增大了压力,又给广大繁殖制种农户带来了很大的经济负担。繁殖制种成本仅九二○一项每亩就要支出30～50元。为了减轻农民负担,增加施用效果,1988年,我们大胆进行了超低容量喷雾器喷洒九二○大区试验,使广大技术人员和农户充分认识到:过多使用九二○,是完全不必要的浪费。我们的作法是:在汕优63和威优6号制种田母
Since the application of hybrid rice seed production since September 20, 920 has been increasing. The first 1 to 2 grams per acre, followed by 5 to 6 grams. At present, widely used in large areas of 13 to 14 grams, some actually used more than 20 grams. The sharp increase of the dosage and the increase of the price have not only increased the pressure on the manufacturers but also brought a great economic burden to the majority of breeding and breeding farmers. Breeding seed production costs only 209 per acre will have to spend 30 to 50 yuan. In 1988, in order to reduce the burden on peasants and increase the effectiveness of application, we boldly conducted the test of spraying the 920 area with an ultra-low volume atomizer to enable the majority of technical staff and peasants to fully realize that excessive use of 920 is totally unnecessary waste. Our approach is: Shanyou 63 and Weiyou 6 system farming mother