新疆地下滴灌无膜移栽棉花干物质积累与需水量关系

Relationship between Dry Matter Accumulation and Water Requirement in Cotton Transplantation without Film under Subsurface Drip Irrigation in Xinjiang

通过田间小区试验,设置不同灌水处理,开展地下滴灌方式下无膜移栽棉花各生育期干物质积累和需水量关系的研究,分析二者之间的相关性。从棉花各生育期干物质积累和需水量拟合结果来看,其R2值均大于0.9,F检验值达到显著水平,说明干物质积累量和需水量具有显著的相关性。各生育期干物质积累和需水量变化趋势符合"S"变化规律,干物质积累、需水量的峰值均出现在花铃期,日增干物质质量在3.79～4.99g之间,日均需水量在4.88～7.41mm之间。

The field experiments with different irrigation treatments were carried out to study the relationship between cotton dry matter accumulation and water requirement during the whole growth period transplantation without film under subsurface drip irrigation; From the fitting results of cotton dry matter accumulation and water requirement for each period, the values of R2 were all more than 0.9, the F test value reaches a significant level, which indicated that the amount of dry matter accumulation and water requirement had a significant correlation; Dry matter accumulation for each period and water requirement variation trends were in line with the variation principle of the ＂S＂, the peak values of both dry matter accumulation and water requirement appeared in the flowering and boll stage. Daily gain of dry matter changed from 3.79 g to 4.99 g, and daily average water requirement changed from 4.88 mm to 7.41 mm.