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| 马尾松种源对磷肥的遗传反应及根际土壤营养差异 | |
| 引用本文： | 周志春,谢钰容,金国庆,吴吉富,陈跃.马尾松种源对磷肥的遗传反应及根际土壤营养差异[J].林业科学,2003,39(6):62-67. |
| 作者姓名： | 周志春 谢钰容 金国庆 吴吉富 陈跃 |
| 作者单位： | 1. 中国林业科学研究院亚热带林业研究所,富阳,311400 2. 福建省武平县林业局,武平,364300 3. 福建省南平造纸营林总公司,南平,353000 |
| 基金项目： | 国家自然科学基金 ( 3 0 0 70 63 2 )，浙江省自然科学基金 ( 3 0 0 2 0 6)，“十五”国家科技攻关“南方主要针叶用材树种新品种选育 及培育技术”课题，福建省科技厅项目“马尾松营养高效基因型的选育及配套育林技术研究”，中国林科院亚林所与福建省南平造纸营林 |
| 摘 要： | 利用5a生马尾松种源与磷肥互作试验林，研究不同种源对磷肥的遗传反应式样以及在低(缺)磷环境下的根际营养差异。结果发现，广东高州和广西岑溪两种源对磷肥的反应显著，属于对磷肥敏感型种源。广东信宜和福建武平两种源对磷肥反应不敏感，属于耐低磷型或对磷肥不敏感型种源，而江西崇义种源显著的磷肥效应仅在造林后头2～3年显示。对于根际土的的化学性质，不同种源虽有较大差异，但根际土的有机质、全氮、水解氮和有效磷含量一般显著高于非根际土。不同种源根际对土壤中的磷都具有活化作用和富集作用，尤其是广东信宜和福建武平两种源对土壤磷的活化和富集作用最为强烈，这可初步解释这两个种源对磷肥不敏感、能适应低(缺)磷胁迫的遗传机制。马尾松不同种源根际土壤并未发生明显的酸化。 |
| 关 键 词： | 马尾松 种质资源 磷肥 遗传反应 根际土壤 营养差异 |
| 修稿时间： | 2002年3月29日 |
GENETIC RESPONSE OF PINUS MASSONIANA PROVENANCES TO PHOSPHORUS SUPPLY AND NUTRIENT CHARACTERISTICS OF THEIR RHIZOSPHERE SOIL |
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| Zhou Zhichun Xie Yurong Jin Guoqing.GENETIC RESPONSE OF PINUS MASSONIANA PROVENANCES TO PHOSPHORUS SUPPLY AND NUTRIENT CHARACTERISTICS OF THEIR RHIZOSPHERE SOIL[J].Scientia Silvae Sinicae,2003,39(6):62-67. | |
| Authors: | Zhou Zhichun Xie Yurong Jin Guoqing |
| Abstract: | A provenance-by-phosphorus-interaction trial of Pinus massoniana at age 5 was conducted to study genetic response of different provenances to phosphorus supply and their nutrient characteristics of rhizosphere soil under phosphorus stress.Significant phosphorus effect was found for both provenances of Cenxi GX and Gaozhou GD regarded as sensitive provenances to phosphorus supply,while Xinyi GD provenance and Wuping FJ provenance had higher tolerability to phosphorus stress or less sensitivity to phosphorus supply.For Chongyi JX provenance,the response to phosphorus was found to be marked only at age 2 or 3.There existed great differences in chemical characteristics of rhizosphere soil among 5 provenances. Percentages of organic matter,total N,hydrolytic N,and available P in rhizosphere soil were usually much higher than those in non-rhizosphere soil.Result indicated that P.massoniana roots of different provenances had an effect of soil phosphorus activation and available phosphorus enrichment,especially both provenances of Xinyi GD and Wuping FJ,which could preliminarily explain their genetic mechanism of adaptation to phosphorus stress.Marked acidification was not observed in their rhizosphere soil for provenances tested. |
| Keywords: | Pinus massoniana Provenance Phosphorus supply Genetic response Rhizophere Phosphorus activation and enrichment |
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