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以耐荫品种南豆12为材料,在“玉-豆”带状套作模式下,研究了在R7前期、后期两个时间点喷施乙烯利、立收谷、克无踪3种化学催熟剂对大豆机收品质的影响。结果表明:在不同的喷施时间,3种催熟剂均能不同程度地促进大豆衰老、植株叶片脱落和各器官脱水干燥,这为套作大豆的机械化收获创造了有利条件。与对照相比,喷施乙烯利能显著促进叶片的脱落,且对产量影响最小,但籽粒脱水缓慢;克无踪次之;而立收谷在加速籽粒脱水方面效果最为明显,至第9天籽粒含水量即降至适宜机收的水平,比对照提前了9 d,但显著降低百粒重和平均单粒重。此外,3种催熟剂对大豆籽粒的油分含量、蛋白质含量和自然脱落无显著影响。因此,在套作大豆生产中,可以根据不同情况选用催熟剂,保证大豆的机械化收获。
With the tolerant species Nandou 12 as material, the effect of spraying ethephon, Liyugu and Kebuqi on the early stage and later stage of R7 under the “Jade-Bean” Effect of chemical ripening agent on the quality of soybean machine. The results showed that the three ripening agents promoted the senescence of soybean, the shedding of plant leaves and the dehydration of organs at different spraying times, which provided favorable conditions for mechanized harvesting of soybean. Compared with the control, spraying ethephon could significantly promote the leaf shedding and had the least impact on the yield, but the grain dehydration was slow; no trace was followed; while Liyugu Valley had the most obvious effect on accelerating the dehydration of the grain. By the 9th day, The water content dropped to the appropriate harvest level, 9 d earlier than the control, but significantly reduced the 100-grain weight and the average single grain weight. In addition, three ripening agents had no significant effect on the oil content, protein content and natural shedding of soybean grains. Therefore, in the intercropping soybean production, you can choose ripening agent according to different situations, to ensure the mechanized harvest of soybean.