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70年代以来,集约栽培的杨树人工林(杨树速生丰产林)在我国有了快速的发展,收到了显著的经济效益与生态效益。这种人工林近年正在向我国西北干旱地区发展。据宁夏青铜峡市树新林场试验,合作杨速生丰产林的经济效益比过去提高了3～5倍。我国是一个水资源短缺的国家,干旱地区林木丰产栽培中灌水是关键的措施,如何科学用水,节约用水,利用较少的灌水量得到较多的木材,即所谓林木节水栽培,是当前干旱地区人工林发展的重要问题。到目前为止,这个问题在干旱地区没有进行过系统的研究。为了探讨干旱地区杨树速生丰产林合理用水技术,于1989年设置了林木灌溉试验,系统地测定了田间供水量、林木生长指标与水分生理指标,分析供水对生长和水分生理过程的影响,为林木节水灌溉技术提供依据。
Since the 1970s, intensive cultivation of poplar plantations (poplar fast-growing high-yield forests) in our country has been rapid development, has received significant economic and ecological benefits. In recent years, this plantation is being developed to arid areas in northwestern China. According to Ningxia Qingtongxia Shuxin Forest test, the economic benefits of fast-growing and afforestation Yang than in the past increased by 3 to 5 times. China is a country with a shortage of water resources. Irrigation in high-yielding trees in arid regions is the key measure. How to use water scientifically, save water, and use less water to get more wood? The so-called water-saving cultivation is the current drought Important issues in the development of regional plantations. So far, this issue has not been systematically studied in arid regions. In order to explore the rational use of water for poplar fast growing and high yielding arable land in arid regions, a forest irrigation experiment was set up in 1989 to systematically determine the field water supply, tree growth index and water physiological index, and analyze the effect of water supply on growth and water physiological process. Forest water-saving irrigation technology to provide the basis.