Integrated Application of Organic and Blended Mineral Fertilizers Improves Potato Productivity and Income for Smallholder Farmers in Acidic Soils

T. Girma, B. Biazin, S. Beyene, B. Lemaga
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引用次数: 3

Abstract

Potato (Solanum tuberosum) is the world’s third most important food crop. However, potato productivity is very low in acidic soils that cover about 50% of the arable land in the world. Therefore, the aim of this study was to evaluate the effect of sole and integrated farmyard manure (FYM) and different types mineral fertilizers on yield, yield components and economic returns of potato in acidic soil of Ethiopia. Six treatments: 1) Control (without fertilizer), 2) sole application of the recommended NP (RNP) fertilizer (11 kg/ha N and 40 kg/ha P), 3) sole FYM (28.8 t/ha FYM), 4) half dose of recommended NP fertilizer and half dose of the FYM, 5) blended fertilizer formulated as 17.3 kg N, 34.7 kg P2O5, 7.41 kg S, 2.23 kg Zn, 0.3 kg B + 100 kg/ha), and 6) half blended and half FYM, were arranged in a randomized complete block design. The results revealed that potato plants amended with sole blended fertilizer, and integrated FYM and mineral fertilizers doubled fresh tuber yield as compared to the control. The RNP fertilizer gave the lowest (α < 0.05) marketable potato yields of all the fertilizer treatments. Applications of sole blended or integrated FYM and mineral fertilizers resulted in the highest net benefit with acceptable marginal rate of return. Integrated use of FYM and mineral fertilizers is crucial for improved and sustained smallholder potato production in acidic soils. Further studies are required to examine the long-term effects of blended fertilizers on soil properties.
有机和混合矿质肥料的综合施用可提高酸性土壤中小农户的马铃薯产量和收入
马铃薯(Solanum tuberosum)是世界第三大粮食作物。然而,在酸性土壤中,马铃薯的产量非常低,而酸性土壤覆盖了世界上约50%的可耕地。因此,本研究旨在评价单一和综合农家肥(FYM)与不同类型矿质肥对埃塞俄比亚酸性土壤马铃薯产量、产量构成及经济效益的影响。6个处理:1)对照(不施肥),2)单施推荐NP (RNP)肥(11 kg/ hm2 N和40 kg/ hm2 P), 3)单施FYM (28.8 t/ hm2 FYM), 4)推荐NP肥和FYM肥各施一半,5)混合肥料配制为17.3 kg N、34.7 kg P2O5、7.41 kg S、2.23 kg Zn、0.3 kg B + 100 kg/ hm2, 6)半混合半FYM。结果表明,马铃薯单施混肥,配施矿肥,鲜块茎产量比对照提高了一倍。在所有施肥处理中,RNP肥的可售马铃薯产量最低(α < 0.05)。施用单一混合或综合化肥和矿物肥料产生了最高的净效益和可接受的边际回报率。综合使用化肥和矿质肥料对于改善和维持酸性土壤中小农马铃薯生产至关重要。需要进一步的研究来检验混合肥料对土壤性质的长期影响。
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