| 桤木人工林结瘤固氮的时空变化及其对后续植物的效应(Ⅰ) |
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| 引用本文： | 刘国凡,邓廷秀.桤木人工林结瘤固氮的时空变化及其对后续植物的效应(Ⅰ)[J].山地学报,1996(Z1). |
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| 作者姓名： | 刘国凡 邓廷秀 |
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| 作者单位： | 中国科学院、水利部成都山地灾害与环境研究所，中国科学院、水利部成都山地灾害与环境研究所 成都 61004l，成都 61004l |
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| 摘 要： | 桤木在四川盆地中北部山丘区,普遍具有良好的结瘤能力:单株五年生林木结瘤量40～160g(鲜重),十年生最佳达200g左右.而在盆地南部酸性紫色土和黄壤上结瘤量显著降低.影响结瘤的主要因素是土壤的pH、质地和碳酸钙含量.pH中性和微碱性是结瘤的适宜环境,质地较轻、排水良好处结瘤较多,碳酸钙含量18％以上,结瘤受到抑制.
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| 关 键 词： | 桤木 结瘤 生态条件 |
TIME-SPACE VARIATION OF NODULATION AND NITROGEN FIXATION IN ALDER PLANTATION AND ITS AFTER-EFFECT ON PLANT GROWTH(1) |
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| Liu Goufan Deng Tingxiu.TIME-SPACE VARIATION OF NODULATION AND NITROGEN FIXATION IN ALDER PLANTATION AND ITS AFTER-EFFECT ON PLANT GROWTH(1)[J].Journal of Mountain Research,1996(Z1). |
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| Authors: | Liu Goufan Deng Tingxiu |
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| Abstract: | The alder forest distributed in the hill and mountain region in the north and middle part of Sichuan Basin had a higher nodulation capacity generally. The fresh weight living nodule in 5a was 40-160g,and in 10a plant could be up to 200g in the suitablest condition,but it decreased significantly in the acid purplish soils of southern basin. The main factors effected the nodulation were the soil pH, texture and calcium content. The pH neutral and low calcareous soils were suitablest for the nodulation. there was better nodulation in the soils with sandier texture and drainage easiness too. Nodulation was inhibited in the highly calcareous and CaCo3 contents over 18%. |
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| Keywords: | alder nodulation ecological condition |
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