| 毛红椿不同家系磷素利用特性的研究 |
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| 引用本文： | 孔超,刘军,姜景民,李彦杰.毛红椿不同家系磷素利用特性的研究[J].林业科学研究,2012,25(5):590-596. |
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| 作者姓名： | 孔超 刘军 姜景民 李彦杰 |
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| 作者单位： | 中国林业科学研究院亚热带林业研究所,浙江富阳,311400 |
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| 基金项目： | 国家林业公益性行业科研专项重点项目(201104001);浙江省重大科技专项(2008C02004-2) |
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| 摘 要： | 利用8个对土壤磷素敏感程度各异的毛红椿家系,设置4个磷素水平的土培盆栽试验,研究其不同磷素水平下的磷素利用特性.结果表明:毛红椿对于磷素环境极为敏感,参试的8个家系在少量施磷肥后其干物质积累量比天然红壤基质环境下增长3～19倍.毛红椿不同家系干物质积累量在不同磷素水平下差异巨大,在低磷胁迫下生长最好的家系其干物质积累量是生长最差家系的7倍左右,在高磷水平下生长最好的家系是最差家系的2.6倍左右.磷素吸收量是造成毛红椿家系在不同磷素环境下生长差异的主要原因.相关分析表明:毛红椿家系干物质积累量与苗高和地径、根长、根体积、根表面积、须根数等参数呈显著正相关.初步确定根长、根表面积、根体积、须根数作为耐低磷型优良家系的特异性指标.
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| 关 键 词： | 毛红椿 家系 低磷胁迫 遗传变异 |
| 收稿时间： | 3/5/2012 12:00:00 AM |
Characteristics of Phosphorus Utilization in Families of Toona ciliata var. pubescens |
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| KONG Chao,LIU Jun,JIANG Jing-min and LI Yan-jie.Characteristics of Phosphorus Utilization in Families of Toona ciliata var. pubescens[J].Forest Research,2012,25(5):590-596. |
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| Authors: | KONG Chao LIU Jun JIANG Jing-min and LI Yan-jie |
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| Institution: | Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China;Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China;Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China;Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China |
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| Abstract: | Soil culture at 4 phosphorus levels was conducted to illustrate characteristics of phosphorus utilization in 8 families of Toona ciliata var. pubescens with different responses to phosphorus supply. The results indicated that the seedlings were very sensitive to phosphorus supply, and the biomass accumulation of those with minor phosphorus supply were 3-19 times those in natural red soil. At different phosphorus levels, great differences in productivity were found among families. Under low phosphorus stress, the highest ones were 7 times those of the lowest, and under high phosphorus level, the highest ones were 2.6 times those of the lowest. P absorption efficiency was the main reason making differences of dry matter accumulation among families. The dry matter accumulation has a high and positive correlation to height and basal diameter of seedlings and root parameters. The root length, root volume, root surface, and the number of fibrous roots were selected as the special characteristics of families that can endure low phosphorus. |
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| Keywords: | Toona ciliata var pubescens family low phosphorus stress genetic variation |
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