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意大利72杨于七十年代初引进我国,目前江苏、山东、河北、河南、安徽、浙江、湖南等省均有栽培.它是一种生长快、干形直、抗病虫害能力较强的优良树种.近几年来,滨海地区也引种了72杨,一般生长良好,但也有生长不够好的,这除了受土壤肥水条件影响外,主要与土壤盐份有密切关系.为此我们在1981—1984年对72杨进行了耐盐试验,现初报如下:试验地自然概况试验地设在江苏射阳沿海防风林试验站内的滨海盐碱地上.地处亚热带北缘,年平均气温13.7℃,最高气温35.8℃,最低气温-10.40℃,年降雨量1034.8毫米,多集中于7—8月.土质为中壤,PH值在7.5—8.5之间,土壤含盐量(指NaCl,下同)一般在0.1—0.2%范围内,潜水面一般在1.5—2米,雨季常升高到1米以内.
72 Yang of Italy was introduced into our country in the early seventies, and is currently cultivated in Jiangsu, Shandong, Hebei, Henan, Anhui, Zhejiang and Hunan provinces, etc. It is a fine tree that grows rapidly, dries straight and has strong pest resistance In recent years, 72 poplars have also been introduced in the coastal area, and generally grow well, but also grow well enough, which is closely related to soil salinity except for soil fertility and water conditions. Salt tolerance test was carried out on 72 Yang, the first report is as follows: The natural test of the test site is located on the coastal saline-alkali land in the coastal windbreak test station of Sheyang, Jiangsu Province, which is located in the northern margin of the subtropical zone with annual average temperature of 13.7 ℃ and maximum temperature of 35.8 ℃ , The lowest temperature -10.40 ℃, the annual rainfall of 1034.8 mm, mostly concentrated in July-August. Soil is medium, PH value between 7.5-8.5, the soil salinity (referring to NaCl, the same below) is generally in the 0.1- 0.2% range, diving surface is generally 1.5-2 meters, the rainy season often increased to less than 1 meter.