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首页> 外文期刊>International journal of soil science >Reuse of Date Palm by-Products for Efficient Use of Nitrogen Fertilizer
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Reuse of Date Palm by-Products for Efficient Use of Nitrogen Fertilizer

机译：椰枣副产品的再利用，以有效地利用氮肥

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The present study aims to improve the efficiency of nitrogen fertilizer applied to soil by reuse of date palm by-products after grinding and mixing with sandy loam soil. The date palm by-products collected from different areas, then air dried and grinded. Two fractions selected (i.e., less than 0.5 and 1-2 mm size). The powder mixed with sandy loam soil at the rates of 0.0, 1.0, 2.5, 5.0, 7.5 and 10.0% (w/w). The treated soil incubated at field capacity in plastic container for 30 days. After the incubation period, the soil was air dried and passed through a 2.0 mm sieve. The physical and chemical analyses of sandy loam and treated soils performed. The PVC transparent columns with of 6.0 cm diameter and 30.0 cm length packed with sandy soil at 1.6 gcm~2 soil bulk density to 20 cm depth and then a 5 cm surface layer of treated soil applied. The soil columns arranged as follows: 1) size fraction of date palm by-product, 2) the rate of date palm by-products applications and 3) rate of water applied (5 and 10 pore volumes). The fertilizer applied at the required rate (250 mg L~(-1) ) to soil surface and then the water applied at required rates (0.2 and 0.4 cm min~2). The leachate out of soil columns received. Volume of leachate and concentration of NO_3 was determined. At the end of experiment, the soil was cut to 2.5 cm slices for determining the soluble NO3. Total NO_3 in soil and percolate were calculated and then the loss of fertilizers and fertilizer use efficiency calculated under the experimental conditions. The results showed that increasing the rate of date palm by-products reduced the NO_3 in leachate and increased NO_3 in soil columns. In addition, increasing water application rate increased fertilizers loss in the leachate. The fine fraction of date palm by-products reduced the NO_3 leaching out of soil by about 14.86 and 5.90% for low and high water application rate, respectively in case of fine fraction, reduced nitrate losses. The corresponding values for coarse fraction were 9.73 and 4.35%, respectively. According to the present results, it is possible to reuse the date palm by-products for increasing the fertilizers use efficiency and reduces the problems of groundwater pollution and accumulation of these by-products in farm.
机译：本研究的目的是通过在沙质壤土中研磨和混合后再利用椰枣副产品来提高施氮肥的效率。从不同地区收集到的椰枣副产品，然后风干并研磨。选择两个部分（即小于0.5和1-2毫米大小）。粉末与沙壤土混合的比率为0.0、1.0、2.5、5.0、7.5和10.0％（w / w）。处理过的土壤在塑料容器中于野外温育30天。温育期后，将土壤风干并通过2.0mm筛。进行了沙壤土和处理过的土壤的物理和化学分析。将直径为6.0厘米，长度为30.0厘米的PVC透明柱子以1.6 gcm〜2的土壤容重填充到20 cm的深度的砂土中，然后施加5 cm的处理土壤表层。土壤柱的排列如下：1）椰枣副产物的尺寸分数，2）椰枣副产物的施用量和3）施用水的量（5和10孔体积）。在土壤表面上以所需剂量（250 mg L〜（-1））施肥，然后以所需剂量（0.2和0.4 cm min〜2）施水。从土壤柱中取出渗滤液。测定渗滤液的体积和NO_3的浓度。实验结束时，将土壤切成2.5厘米的切片，以测定可溶性NO3。计算了土壤和渗滤液中的总NO_3，然后计算了实验条件下的肥料损失和肥料使用效率。结果表明，增加椰枣副产物的生成率会降低渗滤液中的NO_3并增加土壤柱中的NO_3。另外，增加水的施用量增加了渗滤液中肥料的损失。在低和高水施用量下，细小椰枣副产物分别降低了NO_3从土壤中的淋失NO_3约14.86％和5.90％，减少了硝酸盐的损失。粗分数的相应值分别为9.73和4.35％。根据目前的结果，可以重新利用枣椰子副产品来提高肥料的使用效率，并减少地下水污染和农场中这些副产品积累的问题。

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