缓释肥条件水稻节水灌溉模式适宜性研究

Suitability of Rice Water-Saving Irrigation Modes Based on Slow-Release Fertilizer

为探明缓释氮肥条件水稻节水灌溉模式适宜性,开展了水稻缓释肥条件不同节水灌溉模式桶栽试验,分析了水稻生育期株高、叶绿素SPAD值、黄熟期产量、秕粒、空秕粒率及干物质分配等变化特征。结果表明,淹灌对株高的促进效果最好,黄熟期达122.5cm,比最差的间歇淹水高9.4%,蓄雨型灌溉模式叶绿素SPAD值7月下旬以后增幅8.7%,生物生命特征强劲,间歇淹水最弱;蓄雨型灌溉模式产量最高为8 364.8kg/hm^2,浅湿晒次之,为7 574.7kg/hm^2,比淹灌分别高36.9%、23.9%;缓释肥条件蓄雨型灌溉模式产量高、秕粒量及空秕粒率低,是最适宜的节水灌溉模式。

To study the suitability of applying slow-release fertilizer of rice cultivation coupled with water saving irrigation,barrels of rice cultivation experiment under different irrigation modes were carried out during rice growing period.Results show that final promoting effect for plant height adopting CFI is the best of all irrigation modes,which comes up to 122.5 cm at yellow ripe stage and is 9.4% higher than AWD mode.Chlorophyll SPAD amplification from the last tenday of July to growth end of RI is 8.7%,presenting powerful biology life signs.Meanwhile Chlorophyll SPAD of AWD is the weakest,relatively.The highest and secondary yield of all irrigation modes are RI and TSAWD,which come up to 8364.8 kg/ha and 7 574.7 kg/ha,and are 36.9%,23.9% higher than CFI,respectively.According to its high yield,high abortive grain and low sterile grain rate,RI is the most optimum rice water-saving irrigation mode based on slow-release fertilizer.