Quackgrass (Elytrigia repens) managed as a cover crop in herbicide-resistant silage corn
Quackgrass (Elytrigia repens) managed as a cover crop in herbicide-resistant silage corn
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DOI：
10.1111/j.1445-6664.2008.00291.x
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发表时间：
2008-09-01
影响因子：
1.4
通讯作者：
Pleasant, Jane Mt
中科院分区：
文献类型：
--
作者：
Gift, Nancy;Hahn, Russell R.;Pleasant, Jane Mt
玉米(Zea Mays L.)青贮料收成很少足以防止土壤侵蚀，但由于时间和成本的限制，大多数玉米种植者不种植覆盖作物。抗除草剂玉米杂交种提供了控制杂草和利用以前未探索的组合的覆盖作物的机会。1999年和2000年在美国纽约的Dryden和Valatie进行了实地研究，以确定管理现有藜草(Elytrigia reprens[L.])的潜力。Nevski)作为抗除草剂青贮玉米的覆盖作物。对玉米杂交种DKC493的3个等位系分别用草甘膦、草甘膦、除草剂、烟磺隆或乙氧菊酯进行处理。在所有地点年份中，使用草甘膦的玉米青贮料产量与使用草甘膦的玉米青贮料产量相似。草甘膦还造成了超过30%的防止土壤侵蚀的门槛的鸭嘴草地面覆盖。在美国东北部的青贮玉米-多年生饲用乳制品轮作中，可以将藜草作为一种多年生覆盖作物进行管理。
The groundcover levels after corn (Zea mays L.) silage harvest are rarely adequate to prevent soil erosion, but most corn-growers do not plant cover crops due to time and cost limitations. Herbicide-resistant corn hybrids provide opportunities to control weeds and to utilize cover crops in previously unexplored combinations. Field studies were conducted in 1999 and 2000 at Dryden and Valatie, New York, USA, to determine the potential for managing existing quackgrass (Elytrigia repens [L.] Nevski) as a cover crop in herbicide-resistant silage corn. Three isolines of the corn hybrid, DKC493, were treated with glyphosate, glufosinate, primisulfuron, nicosulfuron or sethoxydim. Averaged over all site-years, the corn silage yields with glufosinate were similar to those with glyphosate. Glufosinate also resulted in a quackgrass ground cover greater than the 30% threshold for preventing soil erosion. Quackgrass could be managed as a perennial cover crop in silage corn-perennial forage dairy rotations in north-eastern USA.