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杂草和水稻竞争土壤中的养分、水分和阳光,虽逐增加新的栽培品种,但没有能减少杂草的危害。全世界有111个国家种植水稻,总共1.43亿公顷,每年收获3.72亿吨稻谷,而杂草却严重减少着稻谷的产量,影响着粮食的供应和稻谷生产区的生活水平。每年因杂草危害损失约10%,折算为稻谷3700万吨。还有对产量和品质的损失以及由于控制杂草需要的除草剂和人工、机械操作的代价所造成的财政损失等。
Weeds and rice compete with soil nutrients, moisture and sunlight, although the increase of new cultivars, but did not reduce the hazards of weeds. Rice is planted in 111 countries around the world in a total of 143 million hectares and 372 million tons of rice are harvested each year, while weeds severely reduce the production of rice, which affects the supply of food and the living standards in the rice-producing areas. Every year weed damage due to loss of about 10%, converted into 37 million tons of rice. There is also a loss of yield and quality, as well as financial losses due to herbicides and artificial and mechanical operations that are needed to control weeds.