基于膜下滴灌的不同灌水量对黑花生产量及水分利用效率的影响

Effects of Different Irrigation Quota on Yield and Water Use Efficiency of Black Peanut with Drip Irrigation under Film Mulch

为探究膜下滴灌黑花生的适宜灌溉制度,通过测坑试验,研究不同膜下滴灌的不同灌水量对黑花生农艺性状、耗水量、产量及水分利用效率的影响。结果表明:随着水分胁迫的增加,干物质积累量明显减少;处理W1和处理W2之间无显著差异,但是均与处理W3间差异显著;处理W2的百仁重和出仁率高于常规滴灌量处理W1和水分胁迫处理W3,从而导致最终产量高于二者,成为3个处理中产量最高的处理;水分利用效率随着灌溉量的增加而减少,处理W1的水分利用效率显著低于处理W2和处理W3,分别为34.63%和38.14%;不同滴灌处理均在结荚期的耗水量最大,说明该生长阶段是黑花生的需水关键期。综合考虑,处理W2的灌水制度为最优。

For exploring the suitability for irrigation system of black peanut with drip irrigation under film mulch, the effects of different mulched drip irrigation quota on black peanut agronomic traits, water consumption, yield and water use efficiency were studied. The increase of water stress significantly reduced the amount of dry matter accumulation. No significant difference between treatment W1 and W2 was found, but they had significant difference with W3. The hundred kernel weight and kernel rate of treatment W2 were higher than those of the conventional drip irrigation treatment W1 and water stress drip irrigation treatment W3. W2 gave becoming the highest yield. Water consumption increased with irrigation quantity, the water use efficiency of treatment W1 was significantly lower than that of W2 and W3 by 34.63% and 38.14%, respectively. The high soil water consumption in the whole growing period occured on pod stage. Treatment W2 is the irrigation system.