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一、水分管理水稻拔节孕穗期,是它一生中生长最快和需水最多时期,也是耐早、耐寒最弱时期。如果这个时期缺水,幼穗分化就会受影响,易造成穗短小、粒少、空秕粒多。因此,要适当加深水层,一般可以保持6-8厘米。如果这个时期温度低于18℃有必要把水层加深到15—20厘米,通过深水来保护发育中的幼穗,预防障碍型冷害发生。低温过后应立即恢复6—8厘米水层。
First, water management Rice jointing booting stage, it is the fastest growing period of life and water demand is most resistant to early, cold weakest period. If this period of water shortage, panicle differentiation will be affected, easy to cause spike short, less grain, more than empty grain. Therefore, to properly deepen the water, generally can maintain 6-8 cm. If the temperature is lower than 18 ℃ during this period, it is necessary to deepen the water layer to 15-20 cm, and to protect developing young ears through deep water to prevent the occurrence of obstructive cold damage. After low temperature should immediately restore 6-8 cm water layer.