| 根系伸展范围对小麦、油菜耐缺锰能力的影响 |
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| 引用本文： | 方正,吕世华,张福锁.根系伸展范围对小麦、油菜耐缺锰能力的影响[J].中国农业大学学报,1998(Z3). |
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| 作者姓名： | 方正 吕世华 张福锁 |
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| 作者单位： | 北京海淀区圆明园西路2号中国农业大学(西校区)植物营养系;四川农科院土肥所;中国农业大学植物营养系; |
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| 基金项目： | 国家自然科学基金资助 39790100,39425013 |
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| 摘 要： | 在水旱轮作的缺锰土壤上,采用耐缺锰能力具有明显差异的两个小麦品种和两个油菜品系,通过限制植株根系下扎的田间网袋试验方法研究了根系伸展范围与小麦、油菜耐缺锰能力的关系。试验结果表明,将植株根系限制在耕作层导致小麦出现典型的缺锰症,分蘖减少,减产严重。同小麦相比,油菜所受的影响较小,两个品系油菜全生育期均未出现缺锰症,减产幅度也比小麦轻得多。这一结果说明,小麦的耐缺锰能力在很大程度上取决于对中下部土层淀积锰的吸收利用能力,即与根系伸展范围有非常密切的关系;而限制根系下扎对油菜的锰营养状况影响相对较小,即根系伸展范围的差异并不是油菜耐缺锰能力明显高于小麦的主要原因。
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| 关 键 词： | 缺锰 根系伸展范围 锰营养 水旱轮作 |
Effect of Root Extension on the Tolerances of Wheat and Oilseed Rape to Mn Deficiency |
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| Fang Zheng Zhang Fusuo Dept.of Plant Nutrition,CAU,Beijing Lu Shihua Soil , Fertilizer Institute,SAAS,Chengdu.Effect of Root Extension on the Tolerances of Wheat and Oilseed Rape to Mn Deficiency[J].Journal of China Agricultural University,1998(Z3). |
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| Authors: | Fang Zheng Zhang Fusuo Deptof Plant Nutrition CAU Beijing Lu Shihua Soil Fertilizer Institute SAAS Chengdu |
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| Institution: | Fang Zheng Zhang Fusuo Dept.of Plant Nutrition,CAU,Beijing 100094Lu Shihua Soil , Fertilizer Institute,SAAS,Chengdu 610066 |
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| Abstract: | Mn-deficient soil of rice-wheat rotation,the relationship between root extension and the tolerance of wheat and oilseed rape to Mn deficiency was studied by a method of field ny- lon-net which could limit root extension.The results indicated that limiting root in plow layer resulted in typical Mn-deficient symptoms and great decrease of tillers and grain yield in wheat.Compared with wheat,root limitation had less effect on the growth of oilseed rape.Two oilseed rape lines had no obvious symptoms in all grow... |
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| Keywords: | Mn deficiency root extension Mn nutrition rice-wheat rotation |
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