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前言农田杂草是为害农作物的大敌,积极设法清除农田杂草,对于提高作物产量,保证稳定增产,具有特别重要的意义。农田杂草的重要生物学特性之一,就是它们能产生大量的种子和在不良的环境中处于休眠状态而不丧失发芽力。大量存在于土壤中,具有发芽力的杂草种子,在作物生育季节可以随时发芽出土。因此,进行农田杂草种子休眠期的研究,对指导拟定正确的除草措施具有重要意义。分布在黑龙江省旱田和水田的杂草约有300余种,但密度最大、危害性最强的只有几十种。我们对这些杂草进行了调查和研究,并在本文提出了这些杂草种子的休眠期问题。
Preface Farmland weeds are the enemy of crop damage, and actively seek ways to eliminate weeds in farmland, which are of particular significance for increasing crop yields and ensuring a steady increase in production. One of the important biological characteristics of farmland weeds is that they produce large amounts of seeds and are dormant in adverse environments without losing germination. A large number of weed seeds with germination in the soil can be germinated at any time during the growing season. Therefore, the study on dormancy of weed seeds in farmland is of great significance to guide the formulation of correct weeding measures. There are about 300 species of weeds distributed in upland and paddy fields in Heilongjiang Province. However, there are only about a dozen of the most dense and harmful ones. We conducted a survey and research on these weeds and presented the issue of dormancy of these weed seeds in this paper.