播期温度对新疆膜下滴灌棉花出苗率及苗期生长的影响

随龙龙,田景山,姚贺盛,张鹏鹏,梁福斌,王进,张旺锋

Effects of Different Sowing Dates on Emergence Rates and Seedling Growth of Cotton Under Mulched Drip Irrigation in Xinjiang

LongLong SUI,JingShan TIAN,HeSheng YAO,PengPeng ZHANG,FuBin LIANG,Jin WANG,WangFeng ZHANG

表6 不同温度播种棉花出苗至3叶期幼苗形态指标与温度的相关分析

Table 6 Correlation analysis of seedling index and temperature from seedling to three-leaf stage at different temperatures

项目 Item 平均气温 Air mean temperature 膜下5 cm土壤平均温度 Soil mean temperature under 5 cm for mulching film ≥14℃土壤 有效积温 Growing degree days in soil ≥14℃气积温 Growing degree days in air ≥14℃气温 每日热效应 Daily heat effect air 株高 Plant height 0.93** 0.87** 0.84** 0.97* 0.91** 子叶节高度 Cotyledon node height 0.83* 0.74* 0.85** 0.60 0.84** 地上干物质累积 Above-ground dry matter 0.70 0.80* 0.69 0.80* 0.72* 根干物质累积 Root dry matter -0.90** -0.79* -0.95** -0.71* -0.89** 总根长 Total root length 0.73* 0.65 0.77* 0.60 0.72* 根冠比 Root-shoot ratio -0.89** -0.94** -0.88** -0.93** -0.90** 比根长 Specific root length 0.89** 0.78* 0.92** 0.68 0.88** 地上部单位株高的干物质累积量 Dry matter accumulation of plant height in the part of above-ground 0.57 0.70 0.71* 0.56 0.60