玉米—水稻轮作田中牛筋草种群数量监测试验

Monitoring Experiment on Population of Goosegrass in Corn-rice Rotation Field

本文通过2年试验,对湘南地区玉米—水稻轮作田中牛筋草的生长情况进行调查,采用倒置“W”九点取样法,测定牛筋草密度、株高、盖度、鲜重等数量动态指标,监测牛筋草的种群数量变化。结果表明,湘南地区玉米—水稻轮作田中牛筋草第2年的密度、株高、鲜重、盖度明显低于第1年,且生长势弱。

In this paper,a 2-year experiment was conducted to investigate the growth of goosegrass in the corn-rice rotation field in southern Hunan.By using the inverted"W"nine-point sampling method,the quantitative dynamic indexes such as density,plant height,coverage,fresh weight and so on were determined,and the changes of the population quantity of goosegrass were monitored.The results showed that the density,plant height,fresh weight and coverage of goosegrass in the corn-rice rotation field in southern Hunan were significantly lower than the first year,and the growth potential was weak.