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近年来,随引黄灌溉扩种水稻,稻茬麦田面积迅速扩大,由于生态环境和栽培制度的改变,其适生杂草硬草、碱茅、棒头草等伴随灌溉水流传播,发生危害面积迅速扩大,目前己成为我省沿黄地区稻茬麦田的主要恶性杂草。这些杂草主要分布在郑州、新乡、原阳、武陟、濮阳、范县等地,发生危害面积约200—300万亩,发生密度一般每平方米1000—5000株以上,减产20—30%,重者减产50%以上,甚至绝收,每年损失小麦2000—2500万公斤,已成为当地制约小麦生
In recent years, with the expansion of irrigated rice by the Yellow River, the area of wheat field rapidly expanded. Due to the change of ecological environment and cultivation system, its suitable weeds Hard grass, Aloegrass, Rapidly expanding, and now has become the main malignant weeds in the rice stubble fields along the Yellow River in our province. These weeds are mainly distributed in Zhengzhou, Xinxiang, Yuanyang, Wuhu, Puyang, Fan County and other places, the damage area of about 200-300 acres, the density of the general occurrence of more than 1000-5000 per square meter, cut 20-30% , Heavy reduction of more than 50%, or even the absolute loss of 2000-2500 million kilograms of wheat each year, has become a local control of wheat students