Do organic inputs matter - a meta-analysis of additional yield effects for arable crops in Europe
Do organic inputs matter - a meta-analysis of additional yield effects for arable crops in Europe
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DOI：
10.1007/s11104-016-3031-x
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发表时间：
2017-02-01
期刊：
影响因子：
4.9
通讯作者：
Whitmore, A. P.
中科院分区：
文献类型：
--
作者：
Hijbeek, R.;van Ittersum, M. K.;Whitmore, A. P.
有机投入对土壤有机质平衡有积极影响。因此，它们是土壤肥力和作物生长的重要资产。本研究量化了欧洲耕地作物有机投入的额外产量效应，当常量养分不是限制因素时，采用欧洲20个长期试验的数据进行荟萃分析。在磷钾供应充足的条件下，比较了有机物投入和不投入的氮素产量响应曲线的最大值，我们惊讶地发现，在所有试验中，有机物投入的平均增产效应不显著（+1.4%+/- 1.6（95%置信区间））。然而，在某些具体情况下，特别是对于块根和块茎作物、春播谷物、或对于非常桑迪土壤或潮湿气候，有机投入确实增加了可达到的产量。一个显着的相关性之间的增加，可达到的产量和土壤有机质含量的增加，从20个长期的实验在欧洲，这项研究的汇总数据表明，有机投入和/或土壤有机质不一定会增加产量，提供足够的养分由矿物肥料。结果表明，有机投入的增产效应与环境因素有关，但与作物生长之间并不存在简单的关系。
Organic inputs have a positive effect on the soil organic matter balance. They are therefore an important asset for soil fertility and crop growth. This study quantifies the additional yield effect due to organic inputs for arable crops in Europe when macro-nutrients are not a limiting factor.A meta-analysis was performed using data from 20 long-term experiments in Europe. Maxima of yield response curves to nitrogen were compared, with and without organic inputs, under abundant P and K supply.We were surprised to find that, across all experiments, the mean additional yield effect of organic inputs was not significant (+ 1.4 % +/- 1.6 (95 % confidence interval)). In specific cases however, especially for root and tuber crops, spring sown cereals, or for very sandy soils or wet climates, organic inputs did increase attainable yields. A significant correlation was found between increase in attainable yields and increase in soil organic matter content.Aggregating data from 20 long-term experiments in Europe, this study shows that organic inputs and/or soil organic matter do not necessarily increase yields, given sufficient nutrients are supplied by mineral fertilisers. Results show the relevance of some environmental factors for additional yield effect of organic inputs, but no simple relation between organic inputs and crop growth.