“薄、浅、湿、晒”与节水控灌两种灌溉模式对水稻耗水量和产量的影响

Effects of two irrigation modes of TW and WI on water consumption and yield of rice planting

开展稻田"薄、浅、湿、晒"(TW)和节水控灌(WI)试验,研究不同灌溉模式对水稻耗水量和产量的影响。结果发现:1.在水稻各生长期中,TW分蘖后期耗水量显著低于WI(P<0.05,下同),其他时期的水分消耗量与WI相近,彼此差异不大。2.TW和WI的穗长、粒长、千粒重及稻谷产量等指标均非常接近,没有显著性差异;由于TW总耗水量低于WI,因而其稻谷的水分利用效率显著高于WI。试验结果表明,相比于节水控灌,"薄、浅、湿、晒"灌溉模式更有利于降低稻田耗水量,提高水稻的水分利用效率。

Experiments were carried out to study the effects of two irrigation modes of thin-shallow-wet-dry(TW)and water-saving controlled irrigation(WI)on water consumption and yield of rice planting.The results show that under P<0.05,the water consumption of TW is significantly lower than that of WI in the late tillering period while is similar to that of WI in other growing periods;TW and WI have very close indexes of spike length,grain length,1000-grain weight and grain yield;the water use efficiency of TW is higher than that of WI since its total water consumption is lower.It is concluded that TW mode requires less water consumption and has higher water use efficiency compared with WI mode.