• ISSN 1008-505X
  • CN 11-3996/S
姚海, 刘晓荣, 李海洋, 李浩, 杨文彬, 李颖, 杜新忠, 安妙颖, 刘宏斌. 长期大量施用污泥堆肥显著提升华北地区冬小麦−夏玉米产量和土壤碳汇效应[J]. 植物营养与肥料学报. DOI: 10.11674/zwyf.2023518
引用本文: 姚海, 刘晓荣, 李海洋, 李浩, 杨文彬, 李颖, 杜新忠, 安妙颖, 刘宏斌. 长期大量施用污泥堆肥显著提升华北地区冬小麦−夏玉米产量和土壤碳汇效应[J]. 植物营养与肥料学报. DOI: 10.11674/zwyf.2023518
YAO Hai, LIU Xiao-rong, LI Hai-yang, LI Hao, YANG Wen-bin, LI Ying, DU Xin-zhong, AN miao-ying, LIU Hongbin. Long-term application of sewage sludge compost in large amount increases crop yield and soil fertility of North China stably[J]. Journal of Plant Nutrition and Fertilizers. DOI: 10.11674/zwyf.2023518
Citation: YAO Hai, LIU Xiao-rong, LI Hai-yang, LI Hao, YANG Wen-bin, LI Ying, DU Xin-zhong, AN miao-ying, LIU Hongbin. Long-term application of sewage sludge compost in large amount increases crop yield and soil fertility of North China stably[J]. Journal of Plant Nutrition and Fertilizers. DOI: 10.11674/zwyf.2023518

长期大量施用污泥堆肥显著提升华北地区冬小麦−夏玉米产量和土壤碳汇效应

Long-term application of sewage sludge compost in large amount increases crop yield and soil fertility of North China stably

  • 摘要:
    目的 阐明长期施用不同用量污泥堆肥配施化肥对华北地区冬小麦−夏玉米轮作体系作物产量及耕层土壤有机碳储量(SOCS)及全氮(TN)、全磷(TP)、全钾(TK)含量的影响,为污泥高效资源化利用及农业绿色可持续发展提供理论依据。
    方法 污泥堆肥(SW)配施化肥定位试验(2008—2020年)位于华北平原,种植制度为冬小麦−夏玉米轮作,设置100%尿素(N)、50%WS+50%尿素(0.5SW+0.5N)、100%WS+50%尿素(SW+0.5N)、200%WS+50%尿素(2SW+0.5N)、400%WS+50%尿素(4SW+0.5N),处理中的污泥堆肥用量以尿素氮量为基础设计。小麦、玉米收获后,调查籽粒和秸秆产量,0—20 cm土层土壤有机质、全量和有效氮磷钾含量,并计算土壤固碳效率。
    结果 随着污泥堆肥用量的增加,小麦和玉米籽粒和秸秆产量逐渐增加,与N处理相比,0.5SW+0.5N处理小麦、玉米籽粒和秸秆多年平均产量无显著差异,SW+0.5N、2SW+0.5N和4SW+0.5N处理下小麦籽粒产量分别增加了6.97%和8.42%、14.88%,玉米籽粒产量分别增加了11.77%、17.94%和15.38%。土壤中有机碳储量、全氮、全磷、全钾含量在0.5SW+0.5N、SW+0.5N、2SW+0.5N和4SW+0.5N处理下较N处理明显提升。同时,土壤中有机碳储量、全氮、全磷、全钾含量随着污泥堆肥用量的增加显著增加(P<0.05)。N、0.5SW+0.5N、SW+0.5N、2SW+0.5N和4SW+0.5N处理下,土壤全氮多年平均值分别为1.07、1.26、1.56、1.93和2.73 g/kg,全磷为1.19、1.67、2.37、3.27、4.11 g/kg,全钾为18.60、19.06、19.85、20.07、21.19 g/kg。
    结论 与单施尿素相比,以污泥堆肥替代50%的尿素(0.5SW+0.5N)不会影响小麦、玉米籽粒和秸秆产量,而且可以提升土壤肥力。在尿素用量减半条件下,增加污泥堆肥用量可显著提高小麦、玉米籽粒产量和土壤肥力,特别是在污泥堆肥用量为尿素的4倍(按氮素计算)时,小麦和玉米籽粒可稳定增产15%—20%,并且由于高量污泥堆肥的长期施用极大地提升了土壤中有机碳、全氮、全磷、全钾储量,保证了产量的可持续性和土壤的碳汇效应。

     

    Abstract:
    Objectives The study investigated the effects of long-term application of varying doses of sewage sludge compost on crop yield and topsoil organic carbon storage (SOCS) and total nutrient contents in a winter wheat-summer maize rotation system in North China. The result will provide reference for the efficient utilization of sewage sludge compost in agriculture.
    Methods A field experiment was conducted from 2008 to 2020 in North China Plain. The treatments included 100% urea (N), 50%SW + 50% urea (0.5SW+0.5N), 100%SW + 50% urea (SW+0.5N), 200%SW + 50%urea (2SW+0.5N), and 400%SW + 50%urea (4SW+0.5N). Wheat and maize yield, as well as organic carbon storage (SOCS), total nitrogen (TN), total phosphorus (TP), and total potassium (TK) contents in 0–20 cm soil layer were measured each year. And the soil carbon sequestration efficiency was also calculated.
    Results With the increasing of sewage sludge compost input, wheat and maize grain and straw yields increased. The multi-year average yields of wheat and maize grains and straw in 0.5SW+0.5N treatment was not significantly different from that in N treatment, while those in SW+0.5N, 2SW+0.5N, and 4SW+0.5N were significantly higher, with the increment in wheat grain yields by 6.97%, 8.42%, and 14.88%, and in maize grain yields by 11.77%, 17.94%, and 15.38%, respectively. The SOCS, TN, TP, and TK kept enhanced with the rising of sewage sludge compost input amounts (P<0.05). In treatment N, 0.5SW+0.5N, SW+0.5N, 2SW+0.5N, and 4SW+0.5N, the multi-year average TN were 1.07, 1.26, 1.56, 1.93, and 2.73 g/kg; the multi-year average TP were 1.19, 1.67, 2.37, 3.27, 4.11 g/kg; and the multi-year average TK were 18.60, 19.06, 19.85, 20.07, 21.19 g/kg.
    Conclusions Replacing 50% of urea N with sewage sludge compost will not impact the wheat and maize yield, but increase soil fertility significantly. Under half of conventional urea N rate, increasing the application rate of sewage sludge compost significantly elevates wheat and maize grain yields, when the application rate is 8 times of the urea N input, the grain yield will be increased stably by 15%—20%, and the soil organic carbon and nutrient storages increased greatly, which boosts the sustainability of grain yields and the carbon sink effect of soil.

     

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