摘要
针对梁茆顶光照强、风大、温度变化明显．纯林杨树、沙棘易形成“小老树”的特点，甘肃省堡子沟流域自８０年代以来逐步开展了沙棘杨树、沙棘榆树混交种植，收到了明显的效果。试验表明，与纯林相比，混交林不仅对梁茆顶生态位有更强的适应性．而且生长迅速，单株生物量明显增加．土壤理化性质得到改善，肥力提高，降雨入渗量增大，水分利用率增高。
In the light of the characteristics of tops of weirs and moulds, such as strong sunshine. bigwinds, obvious varintions in temperature. and taking into account that pure poplar or sea buckthornwoods can not grow well on the tops. forming the so called'small old trees', mixed plantingmeasures of sea buckthorn with poplars or sea buckthorn with elms have been adopted in Baozigouwatershed of Gansu Province since early 1980's. producing obvious benefits. Experiments show thatcompared with pure wood, mired wood not only has a stronger sdaptability to the ecologicalconditions on tops of weirs and moulds, but also grows well, obviously increasing plant output. Mixedwood can approve the physical and chemical propertics of soil, increase soil fertility, rainfallinfiltration and utilization rate of moisture.
出处
《人民黄河》
北大核心
1994年第11期29-32,共4页
Yellow River
关键词
沙棘混交林
发育
生态位
经济效益
ecological and economic effects. ecological conditions. mixed woods with sea buckthorn,tops of weirs and moulds. Baozigou watershed
