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草害对水稻产量造成的损失,有很多资料可以说明。在菲律宾的国际水稻研究所,得出各种栽培方式年度间的损失平均达65％(相当于每公顷3.2吨)。按损失比率以旱直播最大,移栽稻最少;雨季比旱季大,雨灌田比灌溉田大。按实产损失量来说,水直播比旱直播大,旱季比雨季大;灌溉田和雨灌田间差异很小。在南亚和东南亚六个国家的灌溉移栽稻田旱季进行的169个试验表明,应用最好的栽培措施的田块与一般的田块比较,存在每公顷1.3吨的产量差距,其中15％是因采取了除草措
Grass damage on the loss of rice production, there is a lot of information to illustrate. At the International Rice Research Institute in the Philippines, the average annual loss of various cultivation methods reached 65% (equivalent to 3.2 tons per hectare). According to the loss ratio, the largest was direct seeding with drought, and the least was transplanted rice. The rainy season was larger than the dry season, and the rainy irrigated land was larger than the irrigated land. According to the loss of real production, the live broadcast of water is larger than that of drought, and the dry season is larger than that of the rainy season. There is little difference between irrigated fields and rainfed fields. 169 trials of irrigated transplanted paddy fields in six countries in South and Southeast Asia during the dry season show that the best-practice plots have a yield gap of 1.3 tonnes per hectare compared to the average plots, of which 15% are due to Taken the weeding measures