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Phosphorus characteristics correlate with soil fertility of albic luvisols

机译：磷的特征与白土黄土酚的土壤肥力相关

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摘要

The information on phosphorus (P) characteristics of albic luvisols and their effect on plant P uptake is limited. Twelve soils representing typical albic luvisols were collected from farmland of four regions in northeast China, each with various levels of soil fertility. Phosphorus fractions, P adsorption and P supply capacity of the soils were analysed and were correlated with soil fertility and plant P nutrition. Total P in these soils ranged from 0.62–0.91 g kg−1, and comprised 37–51% organic P, and 49–63% in inorganic forms among which the percentage of occluded P was the greatest, followed by Fe-P, Ca-P, Al-P and loosely bound P was the lowest (<1%). Whereas the % of organic P was not clearly affected by fertility, the % of occluded P increased with fertility. By contrast, both % and contents of other P forms decreased with decreasing soil fertility. Soil P adsorption maxima calculated from Langmuir isotherm ranged from 484 to 912 mg kg−1. Soils with low fertility had the strongest P adsorption, and those with medium fertility had the weakest in all collection regions. The supply capacity of P was positively related to soil fertility. Plant growth correlated positively with P forms with available P correlating best, followed by Fe-P and P supply capacity. Organic C correlated with available P, Fe-P, total P, Al-P and P supply capacity but not with organic P. The results suggest that though the albic luvisols contained high total P, they had low P availability, and P application is required for optimal crop production on these soils.
机译：关于白藜芦醇的磷（P）特征及其对植物P吸收的影响的信息是有限的。从中国东北四个地区的农田中收集了十二种代表典型的白藜芦醇的土壤，每种土壤具有不同的土壤肥力。分析了土壤中磷的含量，磷的吸附和磷的供应能力，并将其与土壤肥力和植物的磷营养相关。这些土壤中的总磷含量为0.62–0.91 g kg-1 ，其中有机磷含量为37–51％，无机形式为49–63％，其中磷的含量最高，其次是铁-P，Ca-P，Al-P和松散结合的P最低（<1％）。有机磷的百分比不受生育力的明显影响，而磷的含量随生育力的增加而增加。相比之下，其他P形式的百分比和含量均随土壤肥力的降低而降低。根据Langmuir等温线计算得出的土壤P吸附最大值在484至912 mg kg-1 之间。在所有收集区中，肥力低的土壤对磷的吸附最强，肥力中等的土壤最弱。磷的供应能力与土壤肥力成正相关。植物生长与磷形态呈正相关，可用磷相关性最高，其次是铁磷和磷供应能力。有机碳与有效磷，铁磷，总磷，铝磷和磷的供应能力相关，但与有机磷无关。结果表明，尽管白铝卢维索酚的总磷含量高，但磷的利用率却很低，磷的施用量在这些土壤上实现最佳农作物生产所需。

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  • 来源
    《Plant and Soil》 |2005年第1期|47-56|共10页
  • 作者

    X. Z. Han; C. Tang; C. Y. Song; S. Y. Wang; Y. F. Qiao;

  • 作者单位

    Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences;

    Northeast Institute of Geography and Agricultural Ecology Chinese Academy of SciencesDepartment of Agricultural Sciences La Trobe University;

    Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences;

    Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences;

    Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Langmuir isotherm; phosphorus adsorption; phosphorus fractionation; phosphorus release;

    机译：Langmuir等温线;磷吸附;磷分级分离;磷释放;

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