摘要
研究结果表明,浅耕油菜的出苗高峰期和出苗终止期分别为播后14d和播后49d,而免耕的分别为播后21d和播后63d,浅耕的出苗集中在播后7-21d,而免耕的出苗集中在播后14-28d。杂草发生量浅耕的比免耕的明显减少,杂草以看麦娘为主,发生量最大。
The results indicated that the date of emergence peak and emergence termination were 14d and 19d after sowing respectively in shallow -tillage. In contrast, the date of emergence peak and emergence termination were 21d and 63d after sowing respectively in no -tillage; emergence of oilseed rape in shallow- tillage concentrated between 7d and 21d after sowing, but it concentrated between 14d and 28d after sowing in no - tillage. The amount of weeds occurrence in shallow - tillage after sowing was obviously less than that in no- tillage. The amount of Alopecurus aequalis Sobol was the greatest in all weeds.
出处
《江西农业学报》
CAS
2007年第6期38-39,42,共3页
Acta Agriculturae Jiangxi
基金
国家自然科学基金项目(30300044)
中科院知识创新工程重要方向项目(KSCX2-SW-124)
关键词
油菜
免耕直播
出苗
杂草发生
Oilseed rape
No- tillage and direct seeding
Emergence
Weed occurrence
