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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。
The results showed that there were 14 families of 8 families in wheat and 17 families of 9 families in paddy field. The seed banks of two types of plots are mainly distributed in the soil layer of 0 ~ 10cm. In the wheat field, 77.74% of grass was drained and 72.05% of paddy fields. The total amount of soil in the wheat field was 11930 plants / m2, which was mainly observed in Japan with Amanita, grasses and rice straw, which accounted for 59.96% of the total. The total amount of soil in the rice fields reached 9855 plants / m2, Grass, section dishes, a thousand gold and Shaped sedges, the amount of 51.03% of the total amount produced. The above seven weeds are the main weeds in farmland in this area, which are the current focus of control. Among them, Amanita and barnyardgrass are the dominant species in wheat and paddy field respectively. Through research, the countermeasures to reduce the provenance of soil weed seed bank were put forward.