| 北京九龙山四种造林苗木凋萎系数的测定* |
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| 引用本文： | 张小泉.北京九龙山四种造林苗木凋萎系数的测定*[J].林业科学研究,1990,3(6):633-637. |
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| 作者姓名： | 张小泉 |
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| 作者单位： | 中国林业科学研究院林业研究所 |
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| 基金项目： | 国家“七五”攻关课题“太行山区立地类型分类、评价和适地适树研究” |
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| 摘 要： | 苗木凋萎系数因树种、土壤质地而异,过去对它研究较少,通常沿用农业上得出的经验公式计算如:永久凋萎系数=土壤最大吸湿水×1.5(1.3～2.5),或用小麦、棉花等农作物的测定结果,但这些数据并不适用于林业上的造林苗木。近年来有些研究人员对一些树种进行了测定,也得到了初步结论,但测定方法尚欠精确,特别是常绿针叶树种,凋萎迹象
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| 关 键 词： | 凋萎系数 土壤相对含水率 林业 造林苗木 塑料袋栽培定期称重法 |
| 收稿时间： | 1989/12/26 0:00:00 |
TESTING ON WILTING COEFFICIENT OF SEEDLINGS OF SEVERAL MAJOR PLANTING SPECIES IN JIULONG HILL,BEIJING |
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| Zhang Xiaoquan.TESTING ON WILTING COEFFICIENT OF SEEDLINGS OF SEVERAL MAJOR PLANTING SPECIES IN JIULONG HILL,BEIJING[J].Forest Research,1990,3(6):633-637. |
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| Authors: | Zhang Xiaoquan |
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| Institution: | The Research Institute of Forestry CAF |
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| Abstract: | This article discussed the wilting coefficient of seedling in different soil textures and seedling standards for four planting species. Some of the important results have been achieved. In the loam soil,the permanent wilting coefficient of Pinus tabulaeformis and Acer truncatum are higher,about 24.5 % and 25.1 % respectively. There are significant difference caused by the soil texture and the seedling standard for Platycladus orientalis in loam soil. Its permanent wilting coefficient is about 19.9 % for untransplanting seedling at 1.5 years, 21.5 % for untransplanting seedling at 2.5 years, 19.2 % for transplanting seedling by 2.5 years. But in sandy loam soil, it is about 12.8%, behind that in the loam. Meanwhile, the temporary wilting coefficient was also a testing factor and the periods of suffering drought has been recorded in this experiment. The wilting coefficient and soil water content were expressed in soil relative water content. |
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| Keywords: | seedling wilting coefficient soil relative water content |
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