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在多年小麦超高产示范中发现,亩产量达到600kg后,灌浆后期早衰已成为小麦高产、超高产的障碍因素。为此,2010~2014年山东省沂水县进行了秸秆还田与秋种深耕试验研究,两季秸秆还田和秋种深耕处理比对照耕层通体容重降低,孔隙度提高,有机质含量增加,保墒能力增强,超高产小麦灌浆后期根系和叶片衰老速度延缓,灌浆速率下降速度变慢,千粒重提高4.8g,容重增加25g/L,亩增产82.1kg,亩产量平均达668.5kg。
In many years of super-high yield wheat demonstration found that, after the yield per mu reached 600kg, the early grain filling stage has become the obstacle of high yield and super high yield of wheat. Therefore, from 2010 to 2014, Yishui County, Shandong Province conducted straw-returning and autumn planting trials. The straw-returning and autumn-sowing treatments in both seasons reduced the bulk density, porosity and organic matter content of the whole plantation, The ability of preserving soil moisture was enhanced. The root and leaf senescence of super high-yielding wheat was slowed down at the late filling stage. The grain filling rate decreased slowly. The grain weight was increased by 4.8g and the bulk density was increased by 25g / L. The mu yield was 82.1kg, and the average yield per mu was 668.5kg.