| 酸性根际肥对石灰性土壤pH和铁有效性的影响研究 |
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| 引用本文： | 李燕婷,白灯莎·买买提艾力,张福锁,江荣风,毛达如.酸性根际肥对石灰性土壤pH和铁有效性的影响研究[J].植物营养与肥料学报,2003,9(3):312-316. |
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| 作者姓名： | 李燕婷 白灯莎·买买提艾力 张福锁 江荣风 毛达如 |
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| 作者单位： | 1.农业部植物营养与养分循环重点实验室 教育部植物-土壤相互作用重点实验室;中国农业大学植物营养系;北京100094; |
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| 基金项目： | 农业部"948"项目-新型CULTAN根际肥与根际施肥技术;"863"计划项目资助. |
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| 摘 要： | 在无植物栽培的条件下通过肥料在土壤中的扩散试验研究酸性根际肥对石灰性土壤 pH值、有效铁含量的影响 ,利用盆栽试验验证对石灰性土壤上花生缺铁失绿黄化症的矫正效果。结果表明 ,酸性根际肥 (pH 1.0～ 2 .0 )中的酸在土壤中扩散的影响半径可达 6cm ,但对土壤pH降低作用最显著的是在距肥料 2cm内 ;在施肥 2 8d内 ,距肥料 2cm处 ,土壤 pH值降低了 0 .9个单位 ,土壤铁有效性 (DTPA浸提量 )增加了 5 .9mg kg ;施用酸性根际肥可使花生叶绿素SPAD值与叶片活性铁含量显著提高 ,克服了花生缺铁黄化症状 ,使施肥区 (肥料周围 2cm内 )土壤pH值显著降低 ,并显著提高了该区土壤铁的有效性和花生对土壤Fe的吸收量。
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| 关 键 词： | 酸性根际肥 石灰性土壤 土壤pH值 铁有效性 花生 缺铁黄化 |
| 文章编号： | 1008-505X(2003)03-0312-05 |
| 修稿时间： | 2002年9月25日 |
Effect of acidic rhizosphere fertilizer on the soil pH and Fe availability of calcareous soil |
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| LI Yan-ting,BAI Deng-sha,ZHANG Fu-suo,JIANG Rong-feng,MAO Da-ru.Effect of acidic rhizosphere fertilizer on the soil pH and Fe availability of calcareous soil[J].Plant Nutrition and Fertilizer Science,2003,9(3):312-316. |
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| Authors: | LI Yan-ting BAI Deng-sha ZHANG Fu-suo JIANG Rong-feng MAO Da-ru |
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| Institution: | 1.Key Lab. of Plant Nutrition and Nutrient Cycling;MOA;Key Lab. of Plant-Soil Interactions;MOE;Dept. of Plant Nutrition;CAU;Beijing 100094;China; |
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| Abstract: | A diffusion experiment and pot trial were conducted to evaluate the effect of acidic rhizosphere fertilizer on the soil pH and Fe availability and the growth, iron deficiency correction of peanut on calcareous soil. The results indicate that application of acidic fertilizer with pH 1-2 decreased the soil pH within 6cm from application point due to the diffusing of H+ from the acidic fertilizer in incubation period of 4 weeks. The extent of pH changes reached 0.9 unit and soil DTPA extractable iron concentration increased by 5.9 mg/kg with 2cm diameter of fertilizer. Results also indicated that acidic fertilizer application increased in the chlorophyll SPAD value, active Fe concentration in peanuts leaves and the total amount of Fe uptake. Therefore, the acidic rhizosphere fertilizer was efficient in correcting iron chlorosis on the calcareous soil in this experiment. |
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