| 宁夏压砂地枣树根系生长发育情况研究 |
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| 引用本文： | 李百云,魏天军.宁夏压砂地枣树根系生长发育情况研究[J].北方园艺,2011(15):18-21. |
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| 作者姓名： | 李百云 魏天军 |
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| 作者单位： | 宁夏农林科学院种质资源研究所,宁夏银川,750002;宁夏农林科学院种质资源研究所,宁夏银川,750002 |
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| 基金项目： | 国家科技支撑计划资助项目(2007BAQ5502); 宁夏自然科学基金资助项目(NZ1077) |
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| 摘 要： | 在2008～2010年间,对压砂地1 a、3～5 a生同心圆枣根系生长发育情况进行了调查.结果表明:1a生的同心圆枣根系垂直分布主要在0～25 cm深土层内,剖面总根量中有近90％粗度小于0.2mm,尤其是0～5 cm深的表层土壤占剖面总根量近60％.与1 a生的同心圆枣根系垂直生长发育情况相比,3 a生的同心团枣垂直分布根量增加了1.5倍,出现了粗度＞3mm的根,垂直分布达65 cm深土层(土层深厚的树).5a生同心圆枣根系垂直生长发育特点,一是0～5 cm深土层根量明显下降、5～25 cm深土层是根系主要分布层；二是25～65 cm深土层的根量明显增加,占该层总根量32.9％～44.3％.其中,粗度＞0.2 mm的根系含量在40％左右.根系水平分布调查表明,1 a、3～5 a生同心圆枣树根系水平分布距离主干分别为50、150、250、300 cm.土施保水剂并配合肥水一体能增加浅层土壤中枣树根系数量,促进其根系增粗.
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| 关 键 词： | 压砂地 枣树 垂直分布 根系粗度 |
Study on Growth and Development of Zyphus jujuba Root in Gravel-mulched Land in Ningxia |
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| LI Bai-yun
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WEI Tian-jun.Study on Growth and Development of Zyphus jujuba Root in Gravel-mulched Land in Ningxia[J].Northern Horticulture,2011(15):18-21. |
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| Authors: | LI Bai-yun WEI Tian-jun |
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| Institution: | LI Bai-yun,WEI Tian-jun(Institute of Germplasm Resources Ningxia Academy of Agricultural and Forestry Sciences,Yinchuan,Ningxia 750002) |
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| Abstract: | To study on growth and development of Zyphus jujuba root,the experiment chose 1 year old and 3 to 5 years old 'Tongxinyuanzao' as material in 2008 to 2010.The results indicated that the vertical distribution of Zyphus jujuba root in one year old mainly distributed in 0~25 cm,especially the root amount in 0~5 cm soil top layer was 60% in soil root profile.The amount of Zyphus jujuba root(diameter<0.2 mm)accounted for 90% in the soil layer.Compared with root in one year old,the root amount of 3-year-old jujub... |
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| Keywords: | gravel-mulched land Zizyphus jujuba vertical distribution diameter of root |
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