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首页> 外文期刊>Cogent Food & Agriculture >On farm verification of soil test-based phosphorus fertilizer recommendations for bread wheat (Triticum aestivum L.) on the vertisols of central highlands of Ethiopia
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On farm verification of soil test-based phosphorus fertilizer recommendations for bread wheat (Triticum aestivum L.) on the vertisols of central highlands of Ethiopia

机译：论面包小麦（Triticum Aestivum L.）对埃塞俄比亚中央高地磷酸盐（Triticum Aestivum L.）的农业验证

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Phosphorus is the most limiting nutrient in most of soils of highlands of Ethiopia. Mathematical models that integrate the soil test indices with fertilizer requirements can be important for phosphorus fertilizer recommendation. This study was conducted to verify the recommended soil test based calibration equation for phosphorus (P) fertilizer for two consecutive years on 16 farmers’ fields. Before planting, the initial soil P level was analyzed and ranged from 5.8 to 11.4 ppm. Based on the P calibration model of Debre Berhan Agricultural Research Center (DBARC), the phosphorus requirement ranged from 17 to 120 P_(2)O_(5) kg ha~(?1). Nevertheless, in the second year, the initial P level was between 5.04 and 14.29 ppm and the need for P_(2)O_(5) ranged from zero to 110.4 kg P_(2)O_(5) ha~(?1) with DBARC model. In contrast, with agronomic phosphorus fertilizer recommendation, the need for P_(2)O_(5) was 138 kg ha~(?1) for both locations for the two years. The first year result revealed that soil test based fertilizer application save 51% of the P_(2)O_(5) applied compared to the agronomic fertilizer recommendation (138 P_(2)O_(5) kg ha~(?1)). However, in the second year DBARC and GARC model, could reduce P_(2)O_(5) fertilizer applied by 65.94 and 44.2%, respectively. The first year result indicated that DBARC model had a mean grain and straw yield penalty of 0.8% and 0.7% compared to the agronomic phosphorus fertilizer recommendation. Similarly, in second year the penalty could be found to be 10.3% and 7.8%. The result also indicated that DBARC P calibration model had the higher net benefit of 19,088 ETB ha~(?1). The same was true for benefit cost ratio. Therefore, from this study, it is recommended that soil test based fertilizer recommendation shall be used for farmers and hence the P critical and P factor for the test crop were found to be 12.56 and 6.41, respectively.
机译：磷是埃塞俄比亚高原土壤中最有限的营养素。将土壤试验指标与肥料要求整合的数学模型对于磷肥推荐至关重要。进行该研究以验证16个农民领域连续两年连续两年的磷（P）肥的推荐土壤试验方程。在种植之前，分析了初始土壤P水平并从5.8〜11.4 ppm的范围。基于德布山农业研究中心（DBarc）的P校准模型，磷要求范围从17〜120 p_（2）o_（5）kg ha〜（？1）。尽管如此，在第二年，初始P级别为5.04和14.29 ppm，并且对P_（2）O_（5）的需求范围为0至110.4 kg P_（2）O_（5）HA〜（？1） dbarc模型。相比之下，随着农艺磷肥推荐，两年地区的P_（2）O_（5）的需求为138公斤HA〜（？1）。第一年的结果表明，与农艺肥料建议相比，土壤试验施肥施肥可节省51％的P_（2）o_（5）（138 p_（2）o_（5）kg ha〜（'1））。但是，在第二年DBarc和GARC模型中，可以减少65.94和44.2％施用的P_（2）O_（5）肥。第一年结果表明，与农艺磷肥推荐相比，DBarc模型的平均谷物和秸秆产量罚款0.8％和0.7％。同样，在第二年中，可以发现罚款是10.3％和7.8％。结果还表明，DBarc P校准模型的净利润较高，19,088 etb ha〜（？1）。福利成本比例也是如此。因此，从本研究中，建议使用基于土壤测试的肥料推荐，用于农民，因此发现测试作物的P严重和P因子分别为12.56和6.41。

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