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雁北半干旱地区杨树速生产丰产技术研究,是根据1976年全国杨树良种鉴定会议提出的要求,我们共同拟定研究方案,组织协作攻关的项目,争取在北方半干旱地区实现杨树人工片林速生丰产的突破。1977年春,在薛在庄、金沙滩、落阵营等林场同时进行平行试验,主要开展杨树速生丰产技术综合研究。现将几项主要丰产技术总结如下:一、主要丰产技术针对本区域气候寒冷、土壤干旱、瘠薄的特点,开展了以品种、密度、水分和肥力为中心的丰产技术研究。(一)选择土层深厚肥沃的造林地根据杨树的生物学特性,决定其速生丰产的主要土壤因素有土层厚度、质地、水分、肥力、酸碱度和含盐量等。所以,在造林前进行了详细的规划设计,划分立地条件
Yanbei semi-arid poplar fast production of high yield technology, is based on the 1976 National Poplar Identification Conference put forward the request, we jointly develop a research program, organize collaborative research projects, in the northern semi-arid area to achieve poplar artifacts Fast growing forest yield breakthrough. The spring of 1977, in Xuezhuang, Jinshatan, camps and other forest at the same time parallel experiments, mainly poplar fast-growing technology comprehensive research. Several major high-yielding technologies are summarized as follows: I. Main High-yielding Techniques Aiming at the cold climate, arid and infertile soil in this region, the research on high yield technology centering on variety, density, water content and fertility is carried out. (A) Select the soil fertile afforestation land According to the biological characteristics of poplar, determine the fast soil fertility of the main soil factors are soil thickness, texture, moisture, fertility, pH and salt content. Therefore, before the afforestation conducted a detailed planning and design, site conditions divided