秦岭北坡水灾迹地岭南核桃种群数量特征与生长的初步研究

本文初步研究了秦岭北坡水灾迹地岭南核桃种群数量特征、生长和存活动态。水灾造成很多生长在泥石流迹地中的核桃树损毁，改变了核桃种群的数量特征和存活动态。调查结果表明，水灾迹地核桃种群为增长型，地径0—15cm的个体占到79．3％。存活曲线为Ⅲ型。人为耕地开垦、水灾和人工栽培是促进核桃种群更新的原因。自然和人为干扰是塑造核桃种群发展型和存活动态的主要因素。结合种群自疏过程，强调了核桃个体发育对空间和资源的不断占据是种群存活动态的根源。最后，依照核桃生长的生物学特征，提出了核桃种群栽培和丰产的一曲瘴议．

Preliminary Research on Quantity Characteristics and Growth of Juglans regia Population in the North Area of the Qingling Mountain

In this paper researches were preliminarily directed towards the quantity characteristics, growth and survival dynamics of Juglans regia population in the north area of the Qingling Mountain. The inundation caused the large loss of Juglans reg/a trees growing in inundafed blocks, which probably changed the population quantity characteristics and survival dynamics. Investigations indicated that the actual Juglans regia population in the sampling plots was an increasing type and its survival curve was type Ⅲ, with a 79.3% proportion of 0 - 15 cm individuals. The artificial plow-land reclamation, inundation and artificial cultivation were the main factors inducing the population regeneration, and the natural and artificial disturbance shaped the population developing types and survival dynamics. Combining with the population self-thinning process, we emphasized that the continuous occupation to space and resource during the process of individual growth and development was the essential cause influencing the population survival dynamics. Finally, according to the biological feature of growth, some suggestions were proposed about Juglans regia cultivation and increasing product of its fruits.