Leachability and phytoavailability of nitrogen, phosphorus, and potassium from different bio-composts under chloride- and sulfate-dominated irrigation water.
Leachability and phytoavailability of nitrogen, phosphorus, and potassium from different bio-composts under chloride- and sulfate-dominated irrigation water.
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在以氯化物和硫酸盐为主的灌溉水中，不同生物堆肥中氮、磷和钾的浸出率和植物有效性。
DOI：
10.2134/jeq2007.0414
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发表时间：
2008
影响因子：
2.4
通讯作者：
T. Honna
中科院分区：
文献类型：
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作者：
Z. Ahmad;Sadahiro Yamamoto;T. Honna
随着氮基堆肥施磷量的增加，人们对磷肥施用量增加的担忧已将趋势转向磷基复合施肥法，但集中在一两种营养元素上并不能满足可持续农业的目标。在最近淡水短缺的情况下，使用盐水灌溉进一步加剧了了解不同堆肥养分释放和吸收的必要性。因此，我们评估了在以氯(-)(氯化钠)和硫酸盐(Na2SO4)为主的灌溉水条件下，按全磷当量(200 kg ha(-1))施用动物、家禽和污泥堆肥改良的砂壤土中磷、氮和钾的淋溶能力和植物有效性。结果表明，SO4(2-)处理下渗滤液中溶解活性P(DRP)浓度高于Cl2-处理。堆肥改良剂对DRP淋失的影响有以下几种模式：污泥、动物、家禽和对照。玉米(Zea Mays L.)与SO4(2-)和非盐分处理相比，Cl(-)灌溉严重抑制了水稻的生长和磷吸收。所有堆肥在全磷当量的基础上使用，但在污泥堆肥改良剂(73.4 mg DW(-1))下，植物(地上部+根)的吸磷量最大，其次是家禽(39.3 mg DW(-1))、动物(15.0 mg DW(-1))和对照(1.2 mg DW(-1))处理。研究结果表明，以SO4(2-)为主的灌溉水对P、其它阴离子(NO3(-))和阳离子(K+)有较强的置换/淋洗能力。在全磷当量的基础上，不同生物堆肥磷释放的差异表明，磷的有效性高度依赖于堆肥来源。
Concerns over increased phosphorus (P) application with nitrogen (N)-based compost application have shifted the trend to P-based composed application, but focusing on one or two nutritional elements does not serve the goals of sustainable agriculture. The need to understand the nutrient release and uptake from different composts has been further aggravated by the use of saline irrigation water in the recent scenario of fresh water shortage. Therefore, we evaluated the leachability and phytoavailability of P, N, and K from a sandy loam soil amended with animal, poultry, and sludge composts when applied on a total P-equivalent basis (200 kg ha(-1)) under Cl(-) (NaCl)- and SO4(2-) (Na2SO4)-dominated irrigation water. Our results showed that the concentration of dissolved reactive P (DRP) was higher in leachates under SO(4)(2-) than Cl(-) treatments. Compost amendments differed for DRP leaching in the following pattern: sludge > animal > poultry > control. Maize (Zea mays L.) growth and P uptake were severely suppressed under Cl(-) irrigation compared with SO4(2-) and non-saline treatments. All composts were applied on a total P-equivalent basis, but maximum plant (shoot + root) P uptake was observed under sludge compost amendment (73.4 mg DW(-1)), followed by poultry (39.3 mg DW(-1)), animal (15.0 mg DW(-1)), and control (1.2 mg DW(-1)) treatment. Results of this study reveal that irrigation water dominated by SO4(2-) has greater ability to replace/leach P, other anions (NO3(-)), and cations (K+). Variability in P release from different bio-composts applied on a total P-equivalent basis suggested that P availability is highly dependent on compost source.
氯化物和硫酸盐引起的土壤无机磷酸盐水提取能力的变化
DOI：
--
发表时间：
2007
期刊：
Environmental Science and Pollution Research (In press)
影响因子：
--
作者：
A.Zahoor;Faridullah;E.S.Haytham;M.Irshad;T.Honna;S.Yamamoto;Ahmed Salim Al-Busaide
通讯作者：
Ahmed Salim Al-Busaide