| 引用本文: | 秦永林,田艳花,陈 杨,等.磷肥品种与土壤磷素活化系数对栗钙土磷素淋溶的影响[J].灌溉排水学报,2020,39(7):138-144. |
| ,et al.磷肥品种与土壤磷素活化系数对栗钙土磷素淋溶的影响[J].灌溉排水学报,2020,39(7):138-144. |
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| 摘要: |
| 【目的】探究磷肥品种与土壤磷素活化系数（PAC）对栗钙土磷素淋溶的影响。【方法】采集栗钙土农田2种PAC差异较大的土壤，采用土柱模拟试验，研究了施用含P2O5为160 kg/hm2的过磷酸钙（MCP）、磷酸一铵（MAP）、磷酸二铵（DAP）对土壤渗漏液的总磷（TP）、可溶性磷（TDP）动态变化以及淋失量的影响。【结果】栗钙土中存在超过40 cm土层的磷肥淋溶损失，PAC为7.72%的土壤淋溶液初始TP质量分数是PAC为0.86%的土壤的1.91倍；TDP是栗钙土磷淋溶的主要形式，占TP的68.8%~82.9%；PAC较高的土壤施用磷肥显著增加磷素淋溶损失，且磷素淋溶损失量显著高于PAC较低的土壤；PAC较高的土壤中DAP的磷肥淋溶损失显著高于MAP和MCP处理，各磷肥淋溶量不足施磷量的2%。【结论】PAC较高的土壤施用磷肥存在较高的磷淋溶风险，DAP处理在栗钙土中的磷素淋溶损失最大。 |
| 关键词: 磷肥；淋溶损失；栗钙土；土壤磷素活化系数 |
| DOI：10.13522/j.cnki.ggps.2019410 |
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| The Combined Effects of Phosphorus Fertilizers Types and Activation Coefficient of Soil Phosphorous on Phosphorous Leaching from Chestnut Soil |
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QIN Yonglin, TIAN Yanhua, CHEN Yang, JIA Liguo, YU Jing, FAN Mingshou
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1. College of Agronomy, Inner Mongolia Agricultural University, Hohhot 010019, China;2. College of Grassland and Resource Environment, Inner Mongolia Agricultural University, Hohhot 010011, China
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| Abstract: |
| 【Background】Alleviating phosphorus leaching from soil not only reduces fertilizes waste in agricultural production but also ameliorates its detrimental impact on environment. Phosphorus leaching from farmland is affected by a multitude of abiotic and biotic factors, and understanding the combined effect of phosphorus fertilizer types and soil texture is important to develop efficient fertilizer use strategies to reduce phosphorus loss in agricultural production.【Objective】The purpose of this paper is to experimentally study phosphorous leaching from a chestnut soil as impacted by different phosphorous fertilizers applied to soil with contrasting phosphorus activation coefficient (PAC).【Method】The experiment was conducted in columns packed with two types of soils with different phosphorus activation coefficient. The fertilizers used in the experiment were monocalcium phosphate (MCP, P2O5 160 kg/hm2), monoammonium phosphate (MAP, P2O5 160 kg/hm2) and diammonium phosphate (DAP, P2O5 160 kg/hm2). During the experiment, we measured the change in total phosphorus (TP) and total dissolved phosphorus (TDP) in the leachate from each column.【Result】Phosphorus in the top 0~40 cm soil was leached. The TP concentration in the leachate from the soil with PAC of 7.72% was 1.91 times higher than that from the soil with PAC of 0.86% at early stage. The TDP was the dominant P in the leachate, accounting for 68.8%~82.9% of TP. Applying phosphate fertilizer to the soil with high PAC significantly increased P leaching, compared to applying to the soil with low PAC. Compared with MCP and MAP, DAP significantly increased P leaching. For all treatments, phosphorus loss from leaching was less than 2% of the applied phosphate fertilizer.【Conclusion】Phosphorous leaching from DAP was the highest among all three phosphorus fertilizers. The soil with high PAC risks phosphorous leaching when phosphate fertilizer was used. |
| Key words: phosphorus fertilizer; leaching loss; chestnut soil; phosphorus activation coefficient |
