联邦德国的一位生物化学家从苦楝树叶和果实中提出了一种苦楝生长素,对水稻有大幅度的增产效果。其方法是,将苦楝树的叶子和果实铡碎,然后加水浸泡24小时,过滤,将浸泡液煮沸后自然冷却即可。试验证明,在水稻生长期的第45天和抽穗期间,用这种浸泡液分 A biochemist from the Federal Republic of Germany has proposed a nematode growth hormone from the leaves and fruits of Neem, giving a dramatic increase in rice yield. The method is that the neem tree leaves and fruit crushed, and then soaked in water for 24 hours, filtered, the soaking solution can be naturally boiled after boiling. Experiments show that during the 45th day of rice growth and during heading, this soaking solution is used