确定埃塞俄比亚阿姆哈拉西北部酸性土壤中的限制性营养元素,以提高面包小麦和柚子的产量

IF 1.3 Q3 AGRONOMY Agrosystems, Geosciences & Environment Pub Date : 2024-05-31 DOI:10.1002/agg2.20516
Zerfu Bazie, Tadele Amare, Erkihun Alemu, Getachew Agegnew, Gizaw Desta, Abere Tenagne, Bitewlgn Kerebh, Atakltie Abebe, Abrham Awoke, Zmie Ambaw, Tesfaye Feyisa, Zelalem Adise, Sefinew Wale
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摘要

由于埃塞俄比亚,尤其是西北部的阿姆哈拉地区土壤肥力下降,粮食作物产量仍然很低。要解决土壤肥力问题,就必须对养分的来源和比例进行微调,并根据地形进行调整。因此,本研究旨在调查是否有必要在酸性土壤中为柚木和小麦施用特定的养分。这项养分缺失研究在戈扎门和马查凯尔地区的 74 块农田中进行。缺失的养分是硫(S)、锌(Zn)和硼(B)。添加了钾(K),包括氮、磷、钾、硫、锌和硼(All+K)。氮加磷(NP)和无肥处理分别作为阳性对照和阴性对照。此外,还包括 50%和 150%的 All+K 处理。研究结果表明,在酸性土壤中施用不同比例的不同养分对两种试验作物的谷物和生物量产量都有显著影响。在不施肥的处理中,茶叶没有产量,面包小麦的产量最低。与单独施用氮磷钾肥相比,施用氮磷钾肥的产量优势不明显。这意味着氮和磷是生产特富麦和面包麦最限制产量的养分,而 KSZnB 养分则不限制产量。因此,需要改进酸性土壤中氮和磷的比例,以便经济地使用肥料。最后,在没有经验证据的情况下,不建议研究地区的小农施用掺混肥料。
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Identifying limiting nutrient(s) for better bread wheat and tef productivity in acidic soils of north-west Amhara, Ethiopia

Food crop productivity is still low because of the decline of soil fertility in Ethiopia, particularly in north-western Amhara. Fine-tuning the source and rate of nutrients is required to solve soil fertility problems along landscape positions. Therefore, this study was initiated to investigate the need to apply selected nutrients to tef and wheat in acidic soils. This nutrient omission study was conducted in 74 farmers’ fields of Gozamen and Machakel districts. The omitted nutrients were sulfur (S), zinc (Zn), and boron (B). Potassium (K) was added, consisting of N, P, K, S, Zn, and B (All+K). Nitrogen plus phosphorus (NP) and no fertilizer treatments were used as positive and negative controls, respectively. Furthermore, 50% and 150% of the All+K treatments were also included. The finding revealed that the application of different nutrient types at variable rates had a significant role in the grain and biomass yield of both test crops in the acidic soils. No tef yield and the lowest yield of bread wheat were obtained from the no fertilizer application treatment. The application of All+K had no significant yield advantage compared to NP fertilizer alone. This implies that N and P are the most yield-limiting nutrients to produce tef and bread wheat, whereas KSZnB nutrients are not yield limiting. Therefore, refining the rates of N and P in acidic soils is needed for the economical use of fertilizers. Finally, applying blended fertilizers without empirical evidence is not recommended for smallholder farmers in the study area.

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来源期刊
Agrosystems, Geosciences & Environment
Agrosystems, Geosciences & Environment Agricultural and Biological Sciences-Agricultural and Biological Sciences (miscellaneous)
CiteScore
2.60
自引率
0.00%
发文量
80
审稿时长
24 weeks
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