作物学报 ›› 2015, Vol. 41 ›› Issue (10): 1564-1574.doi: 10.3724/SP.J.1006.2015.01564
王东*,徐学欣,张洪波,林祥,赵阳
WANG Dong*,XU Xue-Xin,ZHANG Hong-Bo,LIN Xiang,ZHAO Yang
摘要:
2012-2013和2013-2014年度田间试验中设小麦灌浆初期不灌水、畦灌和小麦专用微喷带灌溉个处理,并在灌浆中后期设置不同微喷时间和水量处理,以明确微喷带灌溉对小麦灌浆期冠层温、湿度和粒重的影响。灌浆初期进行处理,当日中午穗层温度降低℃,降幅明显大于W1处理;灌水后第天与无显著差异,第天与无显著差异。处理当日叶片水势显著大于处理,当日光合速率和次日叶片水势与光合速率及千粒重和籽粒产量均与无显著差异,且显著大于处理;的灌水利用效率显著大于处理。在小麦灌浆后期于、、时采用微喷带喷水和均显著降低冠层温度,提高冠层相对湿度、旗叶水势和群体光合速率,且微喷时间越早越有利。本试验结果表明,小麦灌浆初期微喷补灌或中后期在预报高温当天时微喷补水,可显著提高粒重和籽粒产量。
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