不同灌水量对盆栽棉花产量和品质的影响

Effect of Different Irrigation Norm on Yield and Fiber Quality of Potted Cotton

在盆栽条件下,以华杂棉H318为试验材料,参照自然蒸发量,设置5个灌溉比例,研究不同灌水量对棉花产量、品质及水分利用效率的影响。结果表明,随灌水量增加,成铃率和单株铃数增加,籽棉产量上升,水分利用效率呈先升后降的趋势。不同灌水量对棉花的纤维品质影响不大,马克隆值随灌水量的增加而降低。综合考虑棉花的产量、品质以及水分利用效率,灌水量80%为最佳的灌水比例。

A potting experiment was carried out to investigate the effect of different irrigation quantity on cotton.With transgenic insect-resistance hybrid cultivars Huazamian H318 as materials,5 irrigation rates（T1,T2,T3,T4,T5） were set up with reference to the natural evaporation.T1,T2,T3,T4,T5 is 100%,90%,80%,70% and 60%,respectively.The results indicated that higher boll retention rate and bolls per plant appeared to result from the more irrigation quantity.Irrigation rate significantly affected seed cotton yield and water use efficiency of cotton plant.The cotton plant produced more seed cotton yield as irrigation rate increased.Irrigation quantity had little impact on fiber quality,only micronaire value decreased as irrigation quantity increase.Considering the cotton yield,quality and water use efficiency,T3（80%） is the best irrigation rate.