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一、叶面喷施的主要机制杂交水稻制种田穗期,一方面抽穗扬花需消耗较多的营养物质,必须及时施肥加以补足;另一方面父母本预定理想花遇,受种种因素的影响,往往会出现一定的偏差,需人为采取措施进行调节;此外,穗期气温较高,遇阴雨年份,稻株病害常严重发生,则需用药及时防治。实践证明,制种田穗期施行叶面喷施技术有以下优点:
First, the main mechanism of foliar spray Hybrid rice farming spikes, on the one hand, heading and flowering need to consume more nutrients, must be timely fertilization to make up; the other hand, the parents scheduled to spend the ideal, subject to various factors, Often there will be some deviation, people need to take measures to regulate; In addition, the spike temperature is high, in the case of rainy years, rice plant diseases often occur, the need for timely prevention and treatment. Practice has proved that the system of sprouting head application of foliar spray technology has the following advantages: