不同生态型花棒丛固沙改土效益的比较

• 作 者: 赵廷宁 许明耻
• 机 构: 北京林业大学,陕西省榆林县治沙站,
• 出 处: 甘肃林业科技
• 发表日期: 1988年01期
• 关键词: 生态型 改土 芹河乡 极端最高气温 地区概况 陕西省榆林 气象站 主要树种 年平均气温 固沙造林

花棒 Hedysarucm ScoParium Fisct et Mag)是西北沙荒地固沙造林的主要树种,分布广、适应性强。在长期的系统发育过程中分化、形成了多小叶和无小叶花棒两个生态型。本文报告不同生态型花棒丛固沙改土效益的差异。一、调查地区概况调查系在陕西省榆林县芹河乡水磨梁播区进行。据榆林气象站多年观测资料,该地区年平均气温7.9℃,极端最高气温39.6℃,极端最低气温—32.7℃;全年日照时数在2700小时

Hedysarucm ScoParium Fisct et Mag) is a major tree species afforestation in the desertification of Northwest China. It has wide distribution and strong adaptability. Differentiation in the long-term phylogenetic process, the formation of a multi-leaflet and lobular flower stem two ecotypes. This paper reports the difference of benefits of soil and water conservation with different ecotypes of Prunus persica var. First, the survey area survey Department of investigation in Yulin County, Shaanxi Province, Qinhe Township, Shuimiang beam broadcast area. According to Yulin weather station observations for many years, the average annual temperature of 7.9 ℃, extreme maximum temperature of 39.6 ℃, extreme minimum temperature of -32.7 ℃; annual sunshine hours at 2700 hours