预备期;
at fore-period transpiration rates were at high level, and net photosynthetic rates higher at after-period.
各品种在孕穗早期,蒸腾速率都处于较高水平,净光合速率则在孕穗晚期都较高;
fore period and later period management of plant
设备前期管理和后期管理
regulation of fore period management of plant
设备前期管理规定
The period of germination was the most good time about 18 ℃ of the day temperature on average and at 30 ℃ of the highest day temperature in fore-april to end of mid-may.
4月上旬到5月中旬末,日平均气温在18℃左右,最高气温在30℃左右,为最佳出苗期。
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