分蘖期控水处理对旱稻80农艺性状的影响

Effects of Water Control on Agronomic Traits of Handao80 During Tillering Stage

为了探讨旱稻在分蘖期水分胁迫下的反应,以旱稻80为试验材料,通过盆栽方式,研究了分蘖期不同土壤水分处理对旱稻农艺性状及产量的影响。结果表明:土壤水分控制<T6(土壤相对含水量90%~100%)时,随着水分的减少,旱稻80株高、茎蘖数、叶面积及单株干质量降低,结实率和千粒质量变化相对较小,穗长、有效穗数和穗粒数降低幅度较大,进而导致产量显著降低。因此,旱稻分蘖期的土壤相对含水量应保持在90%以上,否则将会影响旱稻最终产量。

In order to investigate the responses of upland rice under different water stress treatments during tillering stage,Handao80 was used as an experimental material to investgate the effects of different soil moisture treatments on the agronomic traits and yield of upland rice through pot experiments during the tillering stage.The results showed that since the soil moisture controled lower than the treatment6(soil relative water content 90%~100%),with the decrease of water,the plant height,tiller number,leaf area and dry weight decreased,but the seed setting percentage and 1000-grain weight changed a little,whereas the panicle length,effective panicle number and grain number per panicle droped remarkably,hence resulted in a significant decline of upland rice yield.So during tillering stage,the soil relative water content should be kept more than 90%,or the yield of upland rice will be influenced significantly.