【摘 要】
:
在京郊潮土上设置田间试验。供试品种为抗旱力较强的“秦爱”和抗旱力较弱的“石狩”。用中子仪和张力计监测土壤水状况,并从水势剖面确定零通量面。结果表明:京郊雨季种植陆
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在京郊潮土上设置田间试验。供试品种为抗旱力较强的“秦爱”和抗旱力较弱的“石狩”。用中子仪和张力计监测土壤水状况,并从水势剖面确定零通量面。结果表明:京郊雨季种植陆稻是可行的,总水量平衡可望达到良性循环,但因雨量分布不匀,关键阶段需佐以灌溉。裸地小区和植被小区的总蒸散量差异不大,试验前后两者土体储水都不多。抗旱性强的品种并不比抗旱性弱的品种省水,但前者的水利用率高于后者。
In the suburbs of the Chao soil set up on the field test. The tested cultivars were “Qin Ai” with strong drought resistance and “Ishikari” with weak drought resistance. Soil water condition was monitored by neutron meter and strain gauge, and the zero flux surface was determined from the water potential profile. The results showed that it is feasible to plant Upland rice in the rainy season in Beijing suburbs, and the total water balance is expected to reach a virtuous circle. However, due to the uneven distribution of rainfall, the key stage should be irrigated. There is not much difference between the total evapotranspiration of bare plot and vegetation plot, both of them have little water storage before and after the experiment. Drought-resistant varieties no less drought-resistant varieties of water-saving, but the former water use efficiency is higher than the latter.
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