播期温度对新疆膜下滴灌棉花出苗率及苗期生长的影响
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随龙龙,田景山,姚贺盛,张鹏鹏,梁福斌,王进,张旺锋
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Effects of Different Sowing Dates on Emergence Rates and Seedling Growth of Cotton Under Mulched Drip Irrigation in Xinjiang
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LongLong SUI,JingShan TIAN,HeSheng YAO,PengPeng ZHANG,FuBin LIANG,Jin WANG,WangFeng ZHANG
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表5 不同温度播种下棉花出苗至3叶期间的温度指标变化
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Table 5 Changes of temperature index from seedling to three-leaf stage at different sowing dates
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年份
Year | 播前3 d膜下5 cm土壤平均温度
Soil mean temperature averaged over three days before sowing date under
5 cm for mulching film (℃) | 平均气温
Mean air 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
热效应值
Daily heat effect air | | 2016 | 17.6 | 16.5 | 19.9 | 175.6 | 82.2 | 0.17 | | 18.4 | 16.1 | 19.3 | 149.4 | 65.9 | 0.15 | | 22.2 | 17.2 | 19.9 | 171.6 | 96.1 | 0.21 | | 2017 | 9.5 | 18.5 | 23.9 | 228.4 | 96.1 | 0.30 | | 12.0 | 18.9 | 24.5 | 231.1 | 113.9 | 0.32 | | 18.7 | 19.2 | 24.8 | 227.3 | 115.4 | 0.36 | | 24.7 | 21.7 | 27.6 | 245.5 | 138.9 | 0.52 |
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