【摘要】 通过对沿江圩区长期稻麦连作田土壤杂草种子库研究,结果表明,土壤杂草种子库中小麦田有8科14种、水稻田有9科17种。2种类型田块的种子库主要分布在0～10cm的土层中。小麦田该层出草量达77.74%,水稻田为72.05%。麦田土壤总出草量为11930株/m2,主要是日本看麦娘、草和稻槎菜,出草量占总量的59.96%;稻田土壤总出草量达9855株/m2,主要是稗草、节节菜、千金子和异型莎草,出草量占总量的51.03%。上述7种杂草是该区农田的主要杂草,均为当前防除的重点,其中日本看麦娘和稗草分别是小麦、水稻田的优势种。通过研究提出了减少土壤杂草种子库种源的对策。更多还原

【Abstract】 The composition of weed seeds in the longtime rice wheat rotation fields in Jiangyu district, Anhui province were studied, the results showed that there were 8 familia, 14 species of weeds in wheat fields, 9 familia, 17 species of weeds in rice fields. These weed seeds were mostly present in 0～10 cm in depth in soil (77.74%of the total in wheat fields, 72.05%in rice fields). The total amount of soil weeds were 11,930 individual plants/m2, 9,855 individual plants/m2 in wheat and rice fields respectively, main weeds in wheat fields were Alopecurus japonicus, Beckmannia syzigachne, Lapsana apogonoides, which accounting for 59.96%of the total, main weeds in rice field were Echinochloa crusgalli, Rotala indica, Leptochloa chinesis, Cyperus difformis, which accounting for 51.03%of the total. Alopecurus japonicus and Echinochloa crusgalli were dominant species in wheat and rice field respectively. In addition, the control measures were brought forward in order to decrease total amount of soil seeds.更多还原