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湖北省自1973年大量引种湿地松以来,幼林一般生长良好,但也有不少地区的幼林不同程度地出现枯梢、植株矮化、多头丛枝或叶呈灰褐色并失水干枯的现象,严重者成片死亡,阻碍了湿地松的进一步发展。为此,我们设样地调查了不同母质发育的土壤上湿地松的生长状况,并分土层取样,测定土壤的理化性状,结合湿地松的生长情况,进行了初步判断分析。现将研究结果报告如下: 研究方法一、野外调查1984—1985年,我们先后到湖南汩罗县、湖北荆州、宜昌、襄樊、咸宁、孝感等地的18个林场和林科所,在第四纪粘土、砂岩、砾岩、页岩、云母片岩及各种灰岩风化物母质发育
Since the introduction of Pinus elliottii in Hubei province in 1973, young plants generally grow well. However, there are also young plants in many areas with varying degrees of blight, dwarfing plants, grayish-brown branches and leaves, and dehydration and dryness, which are serious The death of a person, hinder the further development of the pine. To this end, we set up a sample to investigate the development of different parent material on the growth of soil wetland pine, and sub-soil sampling, determination of soil physical and chemical properties, combined with the growth of slash pine, conducted a preliminary judgments. The research results are reported as follows: Methodology 1. Fieldwork During 1984-1985, we visited 18 forest farms and forestry institutes in Miluo County, Hunan Province, Jingzhou City, Yichang City, Xiangfan City, Xianning County, Xiaogan County, Hubei Province, Age clay, sandstone, conglomerate, shale, mica schist and various limestone weathering material development