• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>PLoS Clinical Trials >Changes in phosphorus fractions associated with soil chemical properties under long-term organic and inorganic fertilization in paddy soils of southern China
【2h】

Changes in phosphorus fractions associated with soil chemical properties under long-term organic and inorganic fertilization in paddy soils of southern China

机译：南方水稻土长期有机无机肥配施过程中磷组分与土壤化学性质的变化

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The identification of phosphorus (P) fractions is essential for understanding the transformation and availability of P in paddy soils. To investigate the soil P fractions associated with soil properties under long-term fertilization, we selected three fertilization treatments, including no fertilization (CK), chemical fertilizers (NPK) and chemical fertilizers combined with manure (NPKM), from three long-term experiments located in Nanchang (NC), Jinxian (JX) and Ningxiang (NX). The results showed that chemical fertilizers combined with manure (NPKM) significantly (P ≤ 0.05) increased the soil total phosphorus, Olsen P and soil organic matter (SOM) by 2, 3 and 1 times, respectively, compared with the NPK treatment, and by 4, 17 and 2 times, respectively, compared with the CK treatment. NPKM significantly increased the grain yield compared with CK and NPK at all sites. The apparent P balance with NPK was higher in NC and NX but lower in JX compared with NPKM. Hedley fractionation revealed the predominance of most of the organic and inorganic phosphorus (Po and Pi) fractions with long-term fertilization, especially with the NPKM treatment, at all sites. The nonlabile P pool decreased by 14% and 18% whereas the moderately labile P pool proportions increased by 3 and 6 times with the NPK and NPKM treatments, respectively, compared to the CK treatment. The labile P pool showed a significant positive relationship with the SOM, total P and Olsen P contents. The moderately labile P was positively correlated with the total P and Olsen P. A significant positive correlation was observed between soil pH and the nonlabile P pool. Redundancy analysis revealed that the moderately labile P fraction (HCl dil. Pi fraction) was remarkably increased by the NPKM treatment and significantly correlated with the soil pH and total P concentration. The labile P fraction (NaHCO3-Pi) showed a strong relationship with the Olsen P and total P. However, the residual P fraction was negatively correlated with the HCl. dil. Pi fraction. We concluded that NPKM application improved P availability by many folds compared to NPK, which could lead to environmental pollution; therefore, the rate of combined application of manure and chemical fertilizer should be reduced compared to chemical fertilizer inputs to minimize the wastage of resources and environmental P losses.
机译：磷（P）组分的鉴定对于了解稻田土壤中磷的转化和有效性至关重要。为了研究长期施肥下与土壤特性相关的土壤磷组分，我们从三个长期试验中选择了三种施肥处理方法，包括不施肥（CK），化肥（NPK）和化肥与肥料结合（NPKM）。位于南昌（NC），金县（JX）和宁乡（NX）。结果表明，与NPK处理相比，化学肥料与粪肥（NPKM）结合显着（P≤0.05）使土壤总磷，Olsen P和土壤有机质（SOM）分别增加了2、3和1倍，并且分别比CK处理高4倍，17倍和2倍。在所有地点，与CK和NPK相比，NPKM显着提高了谷物产量。与NPKM相比，NC和NX中NPK的表观P平衡较高，而JX中的P平衡较低。 Hedley分馏显示，长期施肥，尤其是NPKM处理，在所有地点，大多数有机和无机磷（Po和Pi）组分占主导地位。与CK处理相比，NPK和NPKM处理的非活性P库分别降低了14％和18％，而中度不稳定的P库比例分别增加了3倍和6倍。不稳定的P库与SOM，总P和Olsen P含量呈显着正相关。中度不稳定的磷与总磷和Olsen磷呈正相关。土壤pH与非不稳定的磷库之间存在显着的正相关。冗余分析显示，NPKM处理显着增加了中等不稳定的P分数（HCl稀Pi分数），并且与土壤pH和总P浓度显着相关。不稳定的P馏分（NaHCO3-Pi）与Olsen P和总P密切相关。但是，残留的P馏分与HCl呈负相关。迪尔Pi分数。我们的结论是，与NPK相比，NPKM的应用将磷的利用率提高了许多倍，这可能导致环境污染。因此，与化肥投入相比，应降低肥料和化肥的综合施用率，以最大程度地减少资源浪费和环境磷的损失。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号