Minimizing Phosphorus Mining through Optimum Phosphorus Fertilization in Maize

IF 3.4 3区 农林科学 Q2 ENVIRONMENTAL SCIENCES
Mohammad Asadul Haque, Afroza Sultana Sima, Md Jahiruddin, Richard William Bell
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Abstract

Maize, the third most important cereal crop in the world, has recently been introduced in the Ganges-Meghna mega delta coastal ecosystem, but optimum phosphorus (P) fertilizer rates for high yield and to avoid depletion of soil P reserves have not been determined. The objective of the experiment, repeated over three years, was to identify optimum rates of P for maximizing yield and P use efficiency, and for minimizing depletion of P from the soil. In the dry-seasons of 2020, 2021 and 2023, P was broadcast as triple superphosphate at 0, 12, 24, 36, 48, 60, 72, and 84 kg P ha− 1 to maize (cv. Don-111) on a slightly acid silt loam soil. Maximum grain yield of 11.6, 10.8 and 10.8 t ha− 1 was found at 72, 36 and 48 kg P ha− 1 rate in 2020, 2021 and 2023, respectively. Based on the pooled yield, 60 kg P ha− 1 was the minimum rate required for maximum yield but there was no significant increase in P uptake above 48 kg P ha− 1. The P partial balance was zero at 45 kg P ha− 1. At 48 kg P ha− 1 the partial factor productivity was 201.8 kg grain kg− 1 added P, agronomic use efficiency was 80.6 kg grain kg− 1 added P, and recovery efficiency was 0.563 kg P uptake kg− 1 added P. For sustenance of yield and soil P fertility, 48–60 kg P ha− 1 was optimal for maize yielding 11–12 t ha− 1 in the Ganges-Meghna mega delta coastal ecosystem.

Abstract Image

通过优化玉米磷肥最大限度地减少磷矿开采
玉米是世界上第三大重要谷物作物,最近被引入恒河-梅格纳特大三角洲沿海生态系统,但尚未确定最佳磷肥施用量,以实现高产并避免土壤中磷的消耗。该试验重复进行了三年,目的是确定最佳磷肥施用量,以最大限度地提高产量和磷肥利用效率,并减少土壤中磷肥的消耗。在 2020 年、2021 年和 2023 年的旱季,以 0、12、24、36、48、60、72 和 84 千克 P ha- 1 的剂量向微酸性淤泥质壤土上的玉米(品种 Don-111)施用三过磷酸钙。在 2020 年、2021 年和 2023 年,72、36 和 48 千克 P ha- 1 的最高谷物产量分别为 11.6、10.8 和 10.8 吨 ha-1。根据总产量,60 千克 P ha- 1 是获得最高产量所需的最低比率,但在 48 千克 P ha- 1 以上,钾吸收量没有显著增加。45 kg P ha- 1 时,钾部分平衡为零。在 48 kg P ha- 1 的条件下,部分要素生产率为 201.8 kg 谷物 kg-1 添加量,农艺利用效率为 80.6 kg 谷物 kg-1 添加量,回收效率为 0.563 kg P 吸收 kg-1 添加量。
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来源期刊
Journal of Soil Science and Plant Nutrition
Journal of Soil Science and Plant Nutrition Agricultural and Biological Sciences-Soil Science
CiteScore
5.90
自引率
10.30%
发文量
331
审稿时长
9 months
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.
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