| 张翠荣,吕家珑,潘杨,姜萍,耿瑞霖.冬麦不同施磷水平下土壤磷素淋溶试验[J].干旱地区农业研究,2007,(3):105~109 |
| 冬麦不同施磷水平下土壤磷素淋溶试验 |
| Si mulate of wi nter wheat phosphorus leachi ng i n potted plant |
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| DOI：10.7606/j.issn.1000-7601.2007.03.22 |
| 中文关键词: 冬小麦 土壤磷 淋溶 |
| 英文关键词:winter wheat soil phosphorus leaching |
| 基金项目:国家“973”项目(2005CB121102)； 博士点基金(20040712001)； 西北农林科技大学创新团队计划项目 |
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| 中文摘要: |
| 盆栽冬小麦条件下设置常规施磷,2倍施磷,4倍施磷三个施磷水平,观测不同磷肥施用量及施用方式对土壤磷素淋溶的影响,结果表明:①随着磷肥施用量的增加,淋出液中总磷(TP)浓度也随之提高,可溶性无机磷(MRP)占TP的比例也明显增加,而可溶性有机磷(DOP)占TP的比例却明显降低。②施肥方式不同,磷素淋失的特征也不同,集中施肥(磷肥施在表层3 cm内或与一半土壤混合)能明显地减少磷素淋溶出土体,而与土壤混合均匀施用磷肥会增加磷素的淋溶量,且与土壤混合施用磷肥也会增加可溶态磷的淋溶量。③淋溶发生的时间对磷素的淋溶也有影响,最先淋溶出土壤的磷是附着在细小土壤颗粒上的(PP),它们随着土壤中的优先流流出;其次是有机磷(DOP),与土壤的吸附较弱。随着水分的增加以及淋溶的延续,更多的可溶性磷被溶解而随水流出土壤(MRP)。④土壤磷素含量较低时,主要是可溶性有机磷(DOP)淋溶出来,当土壤含磷水平高或施磷(无机磷肥)量大时,可溶性无机磷(MRP)就成为淋溶的主要形态。 |
| 英文摘要: |
| With simulating of indoor bonsai test,this study investigated soil phosphorus leaching in different measure and ways with the plant growing.The result indicator that: ① the concentration of TP will increase while the phosphorus application increases,the proportion of MRP to TP will increase,the proportion of DOP to TP will decrease;② in different application of phosphorus fertilizer,the character of phosphorus leaching is also different,the concentrate fertilization can induce phosphorus leaching,while mixed the fertilizer with soil will increase the quantity of phosphorus leaching,especially dissolved phosphorus.③ the time of phosphorus leaching also effect the leaching,PP is the first leaching from the soil,the second is DOP,the mostly leaching from soil is MRP.④ DOP can leaching easily,while the content of phosphorus in soil is low,while the content of phosphorus in soil is high MRP is the mostly form of leaching. |
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