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在岷江上游干旱河谷区,自2008年起,连续2a进行了覆草、覆膜、覆草皮、设挡水墙和对照5种不同处理的栽培试验。通过对岷江柏生理生化指标的测定,分析了不同处理对岷江柏生理状况的影响,并运用主成分分析法对不同保墒处理效果进行了评价。结果表明,几种保墒处理均有效地提高了0～30cm土层土壤含水量,平均含水率分别比对照增加了4.88%、4.23%、3.96%、2.18%,从而缓解了水分供需矛盾。将处理下不同的各项指标进行综合评价,其效果表现排序为:覆草、覆草皮、覆膜、挡水墙、对照。因此,在干旱河谷与类似地区的植被恢复与重建过程中,可以优先选择覆草、覆草皮等蓄水保墒措施。
In the arid valley area in the upper reaches of the Minjiang River, since 2008, cultivation experiments of 5 different treatments including grass cover, cover film, grass cover, water retaining wall and control were carried out continuously for 2 years. Through the determination of physiological and biochemical indexes of P. millet, the effects of different treatments on the physiological status of P. brasiliensis were analyzed, and the effects of different moisture conservation treatments were evaluated by using principal component analysis. The results showed that several soil moisture treatments effectively increased the soil water content in 0-30cm soil layer, and the average water content increased 4.88%, 4.23%, 3.96% and 2.18% respectively compared with the control, thus alleviating the contradiction between water supply and demand. The various indicators under the treatment of a comprehensive evaluation, the performance of the order of performance: grass cover, cover grass, cover, retaining wall, control. Therefore, during the process of vegetation restoration and reconstruction in dry valleys and similar areas, priority can be given to the measures of water storage and soil conservation such as grass cover and grass cover.