Cropping sequence and nitrogen fertilizer effects on the productivity and quality of malting barley and soil fertility in the Ethiopian highlands
Cropping sequence and nitrogen fertilizer effects on the productivity and quality of malting barley and soil fertility in the Ethiopian highlands
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DOI：
10.1080/03650340.2014.881474
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发表时间：
2014-09-02
影响因子：
2.4
通讯作者：
Nelson, Paul N.
中科院分区：
文献类型：
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作者：
Agegnehu, Getachew;Lakew, Berhane;Nelson, Paul N.
采用四种前茬作物（蚕豆、豌豆、油菜籽和大麦）作为主地块，四种氮肥施用量（0、18、36和54kgN ha(-1)）作为次地块，于2010年和2011年种植季在埃塞俄比亚高原Nitisols的两个地点进行3个重复试验，评价了麦芽的生产力和品质。除大麦外的前茬作物和施氮显著提高了麦芽的产量和品质。大麦籽粒产量、籽粒饱满度、蛋白质含量和筛分试验均以蚕豆次之，油菜籽次之，豌豆次之。施氮肥显著提高了麦芽的产量、蛋白质含量和筛分试验。所有蛋白质含量均在麦芽品质可接受范围内。在轮作中加入豆科植物也通过增加土壤碳和氮含量来改善土壤肥力。综上所述，考虑前茬作物和土壤氮素状况是实现酿酒大麦产量和品质最大化的关键。使用适当的间折作物可以替代或减少至少一个季节生产麦芽所需的矿质氮肥的量，而不影响其质量。
The productivity and quality of malting barley were evaluated using factorial combinations of four preceding crops (faba bean, field pea, rapeseed, and barley) as main plots and four nitrogen fertilizer rates (0, 18, 36, and 54kgN ha(-1)) as sub-plots with three replications at two sites on Nitisols of the Ethiopian highlands in 2010 and 2011 cropping seasons. Preceding crops other than barley and N fertilizer significantly improved yield and quality of malting barley. The highest grain yield, kernel plumpness, protein content, and sieve test were obtained for malting barley grown after faba bean, followed by rapeseed and field pea. Nitrogen fertilizer significantly increased yield, protein content, and sieve test of malting barley. All protein contents were within the acceptable range for malting quality. Inclusion of legumes in the rotation also improved soil fertility through increases in soil carbon and nitrogen content. We conclude that to maximize yield and quality of malting barley, it is critical to consider the preceding crop and soil nitrogen status. Use of appropriate break crops may substitute or reduce the amount of mineral N fertilizer required for the production of malting barley at least for one season without affecting its quality.