| 张素霞,吕家珑,杨瑜琪,符孟虎.黄土高原不同植被坡地土壤无机磷形态分布研究[J].干旱地区农业研究,2008,(1):29~32 |
| 黄土高原不同植被坡地土壤无机磷形态分布研究 |
| Study on inorganic phosphorus fractionation on sloping land with different vegetation in the Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2008.01.05 |
| 中文关键词: 无机磷形态 分布 典型植被 黄土高原 |
| 英文关键词:inorganic phosphorus fractionation distribution typical vegetation loess plateau |
| 基金项目:2007-04-17 基金项目：黄土高原土壤侵蚀与旱地农业国家重点实验室基金（10501－138）；“973”项目（2005CB121102）；西北农林科技大学创新团队计划项目资助 |
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| 中文摘要: |
| 采用石灰性土壤无机磷分级体系?选取黄土高原4种典型植被：柠条、马铃薯、苜蓿和枣树?与裸地作比较?对自然表层土壤中磷素状况进行分析。结果表明：研究区土壤全磷含量0．55～0．85g／kg?速效磷含量2．402～5．920mg／kg?均处于较低状态；无机磷含量占全磷的60．76％～90．85％?在各无机磷形态中?以Ca－P（79．37％）为主?几乎没有闭蓄态磷（O－P）；不同无机磷形态的比例顺序是：O－P＜Ca2－P＜Al－P＜Fe－P＜Ca8－P＜Ca10－P?其中柠条林地的Ca2－P 和Ca8－P 无机磷最高?其次是枣树?马铃薯和苜蓿几乎相等。相关分析表明?Ca2－P 和Ca8－P 与速效磷均呈显著的正相关关系?因此?Ca2－P 和Ca8－P 是土壤速效磷的主要来源。 |
| 英文摘要: |
| By inorganic phosphorus fractionation method for calcareous soils?study was made on the forms and compositions of inorganic phosphorus in0～20cm layer of calcareous soil on sloping land with different vegetation in the Loess Plateau．The typical vegetation included bare land?Caragana korshinskii? Solanum tuberosum?Medicago sativ a L．and Ziz iphus jujuba．The results showed that the content of total P in the soil with five kinds of vegetation was high?from0．55to0．85g／kg?but the content of available P was low except Caragana korshinskii （5．920mg／kg） and Medicago sativ a L．（5．332mg／kg）．It was also found that inorganic phosphorus was the main proportion of TP．Among the inorganic phosphorus fractionation?the order of the proportion was Ca2－P＜Al－P＜Fe－P＜Ca8－P＜Ca10－P?and the order of the contents of Ca2－P and Ca8－P of the soil was Caragana korshinskii＞Ziz iphus jujuba＞ Medicago sativ a L．≈Solanum tuberosum．And O－P was not found．We also found that both Ca2－P and Ca8－P had a positive correlation with available P and Ca2－P had a positive correlation with Ca8－P． |
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