Integrated soil fertility management for sustainable teff ( Eragrostistef ) production in Halaba, Southern Ethiopia
Integrated soil fertility management for sustainable teff ( Eragrostistef ) production in Halaba, Southern Ethiopia
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埃塞俄比亚南部哈拉巴的土壤肥力综合管理促进画眉草 ( Eragrostistef ) 的可持续生产
DOI：
10.1080/23311932.2018.1519008
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发表时间：
2018
影响因子：
2
通讯作者：
Habte Werede M
中科院分区：
文献类型：
--
作者：
Habte Werede M
在撒哈拉以南非洲地区，无机肥料施用量低和土壤有机质下降往往造成产量损失。在2015年的主要种植季节，在埃塞俄比亚南部进行了画眉草（Eragrostis tef）土壤肥力综合管理试验。处理以推荐的无机肥用量为基础，配施有机肥以提供等量的氮素。在六个农场中重复随机处理，包括100%作为无机肥料，以及无机和有机肥料的比例为50：50，67：33和33：67。除分蘖数和秸秆产量外，其余性状差异均达显著水平（p< 0.05）。无机肥与有机肥的比例为67：33时，籽粒产量最高，而33：67时的总可变成本最低。最高的净效益（520（±50）美元/公顷）是在比例为67：33的情况下获得的，但33：67处理的边际回报率仅为54（±8）%，因此没有为无机肥的额外投资提供足够的回报。因此，33%的无机肥比67%的有机肥更经济可行。这些试验表明，除了减少长期土壤退化外，综合土壤肥力管理也是一种经济上可行的作物管理方式。
Low applications of inorganic fertilizer and decline in soil organic matter often contribute to loss of production in Sub-Saharan Africa. A trial was conducted on integrated soil fertility management of teff (Eragrostis tef) in Southern Ethiopia during the main cropping season of 2015. Treatments were based on recommended rates of inorganic fertilizer, applying organic fertilizer to provide the equivalent amount of N. Randomised treatments were replicated across six farms, including 100% as inorganic fertilizer, and inorganic and organic fertilizers in ratios 50:50, 67:33 and 33:67. All crop characteristics measured, except number of tillers and straw yield, showed statistically significant differences (p< 0.05). An inorganic-to-organic fertilizer ratio of 67:33 provided highest grain yield, while lowest total variable costs were obtained with the 33:67 ratio. Highest net benefit (520(±50) US$/ha) was obtained with the ratio 67:33, but the marginal rate of return over the 33:67 treatment was only 54(±8)%, and so did not provide sufficient return on the extra investment for inorganic fertilizer. Therefore, 33% inorganic fertilizer to 67% organic fertilizer is more economically viable. These trials demonstrate that, in addition to reducing long-term soil degradation, integrated soil fertility management can be an economically viable way of managing crops.