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首页> 外文期刊>Open Agriculture >Effect of Christmas Island rock phosphate and rice straw compost application on soil phosphorus availability and maize (Zea mays L.) growth in a tropical acid soil of Kelantan, Malaysia
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Effect of Christmas Island rock phosphate and rice straw compost application on soil phosphorus availability and maize (Zea mays L.) growth in a tropical acid soil of Kelantan, Malaysia

机译：圣诞岛岩磷酸盐和稻草堆肥应用对马来西亚凯兰丹热带酸性土壤磷的可用性和玉米（Zea Mays L.）生长的影响

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Phosphorus (P) fixation is very common in Malaysian acid soils due to the fixation of soluble inorganic P by Al and Fe under acidic soil pH conditions. Farmers tend to perform lots of liming and apply excess amount of P fertilizers in order to saturate the Al and Fe in the soil so that the plants are able to absorb the remaining P. Excessive liming and application of P fertilizers are not only not economical but also not environmentally friendly. Compost with a large surface area and pool of negative charges could be used to reduce P fixation in acidic soil. Hence, this study was carried out to assess the effect of amending Christmas Island rock phosphate (CIRP) with rice straw (RS) compost in improving soil P availability, nutrient uptake, and dry matter production of maize cultivated on a Malaysian tropical acid soil. A pot experiment was carried out in this study with the use of maize (FI hybrid sweet corn 801) as a test crop. The chemical properties of soils applied with RS compost were significantly improved ( P ≤ 0.05) compared to treatments without RS compost. As the soil pH increased, there was significant reduction in exchangeable acidity, Al and Fe in soil due to exchangeable Al and Fe were fixed with negatively charged functional groups of RS compost’s surfaces, thus increased the P availability and exchangeable cations in the soil applied with RS compost. There was also significantly higher N, P, and K uptake in leaf, stem, and root of maize in the treatments applied with RS compost. Application of CIRP with RS compost was found to increase the soil P availability, maize nutrient uptake, and dry matter production at the end of the pot experiment. An application rate of 15–20?t?hasup?1/sup of RS compost together with 130?kg?hasup?1/sup urea, 200?kg?hasup?1/sup CIRP, and 67?kg?hasup?1/sup muriate of potash is recommended to improve the soil NPK contents and growth of Zea mays in acidic soil.
机译：由于在酸性土壤pH条件下通过Al和Fe固定可溶性无机P，磷（P）固定在马来西亚酸性污染中非常常见。农民倾向于进行大量的跛行，涂抹过量的P肥料，以使土壤中的AL和Fe饱和，以便植物能够吸收剩余的P.过量的黎明和应用P肥料不仅是经济的也没有环保。堆肥与大表面积和负电荷池可用于减少酸性土壤中的P固定。因此，本研究进行了评估修改圣诞岛岩​​石磷酸盐（CIRP）与稻草（RS）堆肥在改善马来西亚热带酸土壤中培养的玉米养分和干物质产量的影响。在本研究中进行了罐实验，使用玉米（Fi杂交玉米801）作为测试作物。与无RS堆肥的处理相比，施用的土壤的化学性质显着改善（p≤0.05）。随着土壤pH增加，可交换酸度显着降低，由于可更换的Al和Fe，土壤中的土壤中的可交换官能团与RS堆肥表面的带负电官能团固定，从而增加了土壤中的P可用性和可更换阳离子RS堆肥。在施用RS堆肥的治疗中，叶片，茎和玉米的叶片，茎和k的摄取量显着较高。发现CIRP与RS堆肥的应用增加了罐实验结束时的土壤P可用性，玉米营养吸收和干物质生产。施用率为15-20？t？ha 1-1 与130？kg？ha ？1 尿素，200？kg？ha ？ 1 CIRP和67？kg？kg？ha ？1 钾肥的杂物被建议改善土壤NPK含量和ZEA的生长可能在酸性土壤中。

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