微润灌与滴灌对黄芪草地温度与产量的影响差异

Effect of Micro-irrigation and Drip Irrigation Difference on Temperature and Yield of Astragalus Grassland

通过大田试验,研究了微润灌与滴灌对黄芪草地冠层气温与地温以及对干草与药用根产量的影响差异,结果表明：（1）滴灌后黄芪冠层气温和地温均低于微润灌黄芪,并且这种情况通常持续3~5d。（2）生长季内,微润灌黄芪冠层≥10℃和土壤≥5℃活动积温较滴灌黄芪分别高90日度和147日度。（3）微润灌黄芪与滴灌黄芪相比,高度生长差异不显著,但微润灌黄芪生长期提前于而枯萎期延后于滴灌黄芪,即微润灌黄芪整个生长期较滴灌黄芪长。（4）微润灌黄芪干草产量高于滴灌黄芪50%以上,药用根产量高于滴灌黄芪60%。

A field experiment to study the effects of micro-irrigation and drip irrigation on canopy air temperature and ground temper- ature as well as hay and medicinal root yield of Astragalus grassland showed the results that： ①After the drip irrigation, Astragalus grassland canopy air temperature and ground temperature were lower than that of micro-irrigation, and this situation usually lasts three to five days. ②In growing season, canopy ≥10℃ and soil ≥5℃ accumulated temperature of micro-irrigation Astragalus grassland were higher than that of drip irrigation 90 day degree and 147 day degree. ③Astragalus grassland of raicro-irrigation compared with drip irrigation, height growth was not significant, but the micro-irrigation grew in advance and withered in delay, which the growth phase of Astragalus grassland of micro-irrigation was longer than the drip irrigation. ④ Hay yield on micro-irrigation Astragalus grassland was higher than 50%, and medicinal root yield was higher than 60% of that on drip irrigation.