Jia Yi Yang, Shahbaz Atta Tung, Jin Ting Xu, Yan Qiong Pan, Li Yang, Xun Bo Zhou
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引用次数: 0
Abstract
To optimize the utilization of straw resources and devise appropriate nitrogen fertilizer application strategies, this study centers on enhancing soil productivity while boosting double-season maize yield in Guangxi, ultimately aiming to foster sustainable agricultural development while pursuing yield. It was a five-year split-plot study where the main plots were straw return and traditional planting treatments, and the subscript were 0 and 250 kg ha− 1 N fertilizer applications. The soil physicochemical property were determined in 0–20 cm and 20–40 cm soil depth. Furthermore, soil samples were fractionated into different size aggregates, followed by a measurement of aggregate distribution and nutrient content. Our findings revealed a distribution trend of large macro-aggregates (> 2000 μm) > small macro-aggregates (250–2000 μm) > micro-aggregates (53–250 μm), with a notably small proportion of aggregates < 0.053 μm. Specifically, 250 kg ha− 1 nitrogen application under straw return (SRN250) demonstrated an enhancement in soil aggregate organic carbon (SOC) content, leading to improved soil physical attributes and stability within the 0–40 cm soil depth. Changes in aggregate total nitrogen, total phosphorus, and total potassium were predominantly observed in the 0–20 cm soil depth. Furthermore, a positive correlation was established between SOC and aggregate stability. The experimental results show that the SRN250 management practice can not only increase maize yields but also enhance the soil fertility within five years. Additionally, the study highlights the crucial role of SOC content in facilitating aggregate formation and increasing large macro-aggregates distribution, indicating the importance of maintaining SOC content for soil health and sustainability.
期刊介绍:
The Journal of Soil Science and Plant Nutrition is an international, peer reviewed journal devoted to publishing original research findings in the areas of soil science, plant nutrition, agriculture and environmental science.
Soil sciences submissions may cover physics, chemistry, biology, microbiology, mineralogy, ecology, pedology, soil classification and amelioration.
Plant nutrition and agriculture submissions may include plant production, physiology and metabolism of plants, plant ecology, diversity and sustainability of agricultural systems, organic and inorganic fertilization in relation to their impact on yields, quality of plants and ecological systems, and agroecosystems studies.
Submissions covering soil degradation, environmental pollution, nature conservation, and environmental protection are also welcome.
The journal considers for publication original research articles, technical notes, short communication, and reviews (both voluntary and by invitation), and letters to the editor.