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在棉花生长后期,喷施乙烯利能促进早熟,减少无效铃,增加霜前花,提高纤维品质,但必须注意其适用范围和使用方法。乙烯利催熟的主要对象是那些秋桃占单当比重的棉田,包括:①北方特早熟棉区相产较高的棉田;②由于间作、套种、迟播、迟发、地湿、土肥、秋雨过多或其它原因形成的秋桃当家的棉田;③单产水平高,秋桃占相当比重的棉田;④需要早腾茬,赶种其它作物的棉田。上述第二、三类棉田,还需根据每年气候情况而确定有无催熟必要。对于那些本来可以全部正常开裂或单产很低的棉田,应用乙烯利催熟不但没有好处,甚至
In the later stages of cotton growth, ethephon spray can promote early maturity, reduce ineffective bell, increase frost before flower, improve fiber quality, but we must pay attention to its scope of application and use. The main targets of ethephon ripening are those in which the autumn peach accounts for the sole proportion of cotton fields, including: ① cotton fields with relatively high yield in northern precocious cotton area; ② cotton fields with high yield due to intercropping, intercropping, late sowing, late onset, Autumn too much or other reasons the formation of the fall of autumn when the owner of the cotton field; ③ high yield, autumn peach accounted for a considerable proportion of cotton fields; ④ need early Tengcui, catch other crops cotton fields. The second and third types of cotton fields need to be determined according to the annual climatic conditions. For those who could have all the normal cracking or low yield of cotton fields, the application of ethephon ripening not only no benefit, or even