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首页> 外文期刊>Plant and Soil >Does the combined application of organic and mineral nutrient sources influence maize productivity? A meta-analysis
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Does the combined application of organic and mineral nutrient sources influence maize productivity? A meta-analysis

机译：有机和矿物养分来源的结合使用是否影响玉米生产力？荟萃分析

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The combined application of organic resources (ORs) and mineral fertilizers is increasingly gaining recognition as a viable approach to address soil fertility decline in sub-Saharan Africa (SSA). We conducted a meta-analysis to provide a comprehensive and quantitative synthesis of conditions under which ORs, N fertilizers, and combined ORs with N fertilizers positively or negatively influence Zea mays (maize) yields, agronomic N use efficiency and soil organic C (SOC) in SSA. Four OR quality classes were assessed; classes I (high quality) and II (intermediate quality) had 2.5% N while classes III (intermediate quality) and IV (low quality) had 2.5% N and classes I and III had 4% polyphenol and 15% lignin. On the average, yield responses over the control were 60%, 84% and 114% following the addition of ORs, N fertilizers and ORs + N fertilizers, respectively. There was a general increase in yield responses with increasing OR quality and OR-N quantity, both when ORs were added alone or with N fertilizers. Surprisingly, greater OR residual effects were observed with high quality ORs and declined with decreasing OR quality. The greater yield responses with ORs + N fertilizers than either resource alone were mostly due to extra N added and not improved N utilization efficiency because negative interactive effects were, most often, observed when combining ORs with N fertilizers. Additionally, their agronomic N use efficiency was not different from sole added ORs but lower than N fertilizers added alone. Nevertheless, positive interactive effects were observed in sandy soils with low quality ORs whereas agronomic use efficiency was greater when smaller quantities of N were added in all soils. Compared to sole added ORs, yield responses for the combined treatment increased with decreasing OR quality and greater yield increases were observed in sandy (68%) than clayey soils (25%). While ORs and ORs + N fertilizer additions increased SOC by at least 12% compared to the control, N fertilizer additions were not different from control suggesting that ORs are needed to increase SOC. Thus, the addition of ORs will likely improve nutrient storage while crop yields are increased and more so for high quality ORs. Furthermore, interactive effects are seldom occurring, but agronomic N use efficiency of ORs + N fertilizers were greater with low quantities of N added, offering potential for increasing crop productivity.
机译：作为解决撒哈拉以南非洲（SSA）土壤肥力下降的一种可行方法，有机资源（ORs）和矿物肥料的组合应用越来越受到认可。我们进行了一项荟萃分析，以提供条件，氮素，氮肥以及氮素与氮肥的组合对玉米的产量，农艺氮利用效率和土壤有机碳（SOC）产生正向或负向影响的全面定量的综合分析在SSA中。评估了四个OR质量等级； I级（高质量）和II级（中等质量）的N含量> 2.5％，而III级（中等质量）和IV级（低质量）的N含量低于2.5％，I级和III级的多酚含量<4％，木质素<15％ 。平均而言，添加ORs，N肥料和ORs + N肥料后，对照的产量响应分别为60％，84％和114％。单独添加或与氮肥一起施用时，随着OR品质和OR-N含量的增加，产量响应总体上会增加。出乎意料的是，高质量的OR观察到了更大的OR残留效应，而随着OR质量的降低而下降。使用ORs + N肥料比单独使用任何一种资源都具有更高的产量响应，这主要是由于添加了更多的N而没有提高N的利用效率，因为在将ORs与N肥料组合使用时，经常会观察到负面的相互作用。此外，它们的农艺氮素利用效率与单独添加的OR并无不同，但低于单独添加的氮肥。然而，在低质量OR的沙质土壤中观察到了积极的交互作用，而当在所有土壤中添加少量N时，农艺利用效率更高。与单独添加的OR相比，联合处理的产量响应随OR质量降低而增加，并且在沙质土壤（68％）中比黏土（25％）观察到更大的产量增加。尽管ORs和ORs + N肥料添加量与对照组相比至少增加了12％，但N肥料的添加量与对照组无差异，这表明需要ORs才能增加SOC。因此，添加OR可能会提高作物单产的同时增加养分的储存，而对于高质量OR则更是如此。此外，很少发生交互作用，但是在添加少量氮的情况下，ORs + N肥料的农艺氮利用效率更高，为提高作物生产力提供了潜力。

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