Soil sampling depth impact on phosphorus yield response prediction in winter wheat

IF 2.3 4区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY
Vaughn Reed, Bronc Finch, Joao Souza, Patrick Watkins, Brian Arnall
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Abstract

Nutrient stratification of no-till managed soil can affect soil test analysis levels of plant-available phosphorus (P). Research has suggested sampling to different depths due to soil acidity, but little work has been conducted to investigate any change to sampling recommendations for immobile nutrients. The objective of this study was to determine the soil sampling depth that had the greatest relationship with yield response to fertilizer-P. The depths sampled in this study were 0–5, 0–10, 0–15, 10–30, 5–10, 5–15, 10–15, and 15–30 cm. The results indicated that the top 15 cm of a soil profile had the greatest amount of Mehlich 3 extractable P (M3P) available and that the 5-to-10 and 5-to-15-cm depths had the highest correlation with relative yield. Soil depths outside of the proposed root zone of winter wheat (Triticum aestivum L.) (15–30 cm) had the lowest correlation with yield response.

Abstract Image

土壤取样深度对冬小麦磷产量响应预测的影响
免耕管理土壤的养分分层会影响植物有效磷(P)的土壤测试分析水平。研究表明,由于土壤酸度的不同,采样深度不同,但很少有研究对固定养分采样建议的任何变化进行调查。本研究的目的是确定土壤取样深度与肥磷产量响应关系最大。本次研究取样深度为0-5、0-10、0-15、10-30、5-10、5-15、10-15和15-30 cm。结果表明,土壤剖面顶部15 cm的Mehlich 3可提取磷(M3P)含量最高,5 ~ 10 cm和5 ~ 15 cm深度与相对产量的相关性最高。冬小麦(Triticum aestivum L.)拟根区以外土壤深度(15 ~ 30 cm)与产量响应的相关性最低。
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来源期刊
CiteScore
3.70
自引率
3.80%
发文量
28
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