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张掖灌区是河西走廊主要的灌溉农业区,从七十年代初期开始,结合农田基本建设,以渠、路为骨架,营造“窄林带,小网格”的农田防护林,基本实现了农田林网化。为了鉴定现有林网对农田的防护性能,探讨林网内小气候形成的农田生态环境与农作物生长发育的关系,为干旱荒漠绿洲灌溉农业区营造农田防护林,建立新的农田生态结构和经济结构提供理论依据,我们于1981——1984年,先后在张掖县境内的九公里试验场、五金站农场,对农田林网的气候效应进行了观测,现将结果报导如下。
Since the early 1970s, Zhangye irrigation district has been the main irrigated agricultural area in the Hexi Corridor. With the construction of farmland and the canal and road as the skeleton, the farmland shelterbelts of “narrow belt and small grid” have been basically constructed . In order to identify the existing protective performance of forest network on farmland, explore the relationship between farmland ecological environment and crop growth and development in microclimate of forest network, build farmland shelterbelt for irrigated agricultural area in arid desert oasis, establish new ecological structure of farmland and economic structure Based on the theory, we observed the climatic effects of farmland shelterbelts in the nine-kilometer test site and the hardware station farm in Zhangye County from 1981 to 1984. The results are reported as follows.