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通过试验表明 ,冬小麦返青期至拔节期间灌水以 4月 2 1日以前效果好 ,其单株性状及产量要素表现好 ,增产明显。
The experiment showed that the irrigation effect of winter wheat during the rejuvenation period to jointing stage was good before April 21, and the characters of individual plants and yield elements were good, and the yield was obviously increased.