常德市鸡眼草生物学特征及危害特性的研究

对常德市鸡眼草的生物学特征及危害特性进行了调查研究。结果表明, 鸡眼草垫状厚度最高(10.76±0.73) cm、最低(4.15±0.55) cm、平均(6.46±2.58) cm,主茎最长(22.33±3.31) cm、最短(9.02±0.74) cm、平均(12.07±4.62) cm, 分枝数最多(61±18.16) 个、最少(14±4.16) 个、平均(27±15.44) 个, 分枝最长(7.34±1.26) cm、最短(4.31±0.77) cm、平均(5.29±1.25) cm,种子数最多(334±138.06) 粒、最少(51±24.24) 粒、平均(120±97.83) 粒, 根分布面积最大(1587.79±979.15) cm²、最少(101.65±32.67) cm²、平均(352.68±595.96) cm²,根分枝最长(6.78±2.08) cm、最短(3.35±0.90) cm、平均(4.28±1.38) cm, 根分枝数最多(15±6.96) 个、最少(7±0.58) 个、平均(10±3.24) 个, 覆盖度最大(23.89±11.099)%、 最小(2.44±0.96)%、 平均(6.71±7.86)%, 密度最大(6±2.49) 株/m²、最小(4±1.00) 株/m²、平均(5±1.58) 株/m², 鸡眼草伴生植物较少, 且伴生植物密度、覆盖度均较低。

Study on biology characteristics and harmfulness of Kummerowia striata in Changde

The biology characteristics and harmfulness of Kummerowia striata were investigated.The highest plant height was(10.76±0.73) cm,the lowest(4.15±0.55) cm,and the average(6.46±2.58) cm.The longest main stem length was(22.33±3.31) cm,the shortest(9.02±0.74) cm and the average(12.07±4.61) cm.The maximum winding number was 61±18.16,the least 14±4.16 and the average 27±15.44.The longest branch length was(7.34±1.26) cm,the shortest(4.31±0.77) cm and the average(5.29±1.25) cm.The maximum number of seeds was 334±138.06,the least 51±24.24,and the average 120±97.83.The maximum root distribution area was(1 587.79±979.15) cm2,the minimum(101.65±32.67) cm2,and the average(352.68±595.96) cm2.The longest root branch was(6.78±2.08) cm,the shortest(3.35±0.90) cm and the average(4.28±1.38) cm.The most root branches were 15±6.96,the least 7±0.58 and the average 10±3.24.The maximum plant coverage was(23.89±11.09)%,the minimum(2.44±0.96)% and the average(6.71±7.86)%.The maximum planting density was 6±2.49,the minimum 4±1.00,and the average 5±1.58.A few associated plants of K.striata with low density and coverage also occurred.