中国沼液施用对作物产量效应的Meta分析

Meta Analysis on the Effect of Biogas Slurry on Crop Yield in China

为了探讨在中国地区施用沼液的增产效应,文章综合1999～2017年间已发表的78组田间试验研究数据,应用Meta分析方法定量分析沼液施用在不同条件下对作物产量的效应。结果表明,施用沼液提高作物产量在西北和华北较为明显,西南和华东地区略低;沼液的增产效应不受作物影响,小麦、玉米、番茄和水稻产量均有所提高,增产率分别为15.97%,20.62%,18.02%和12.57%;沼液施用年降雨量≥500 mm和年降雨量<500 mm时均能提高作物产量;较年平均气温<12℃,年平均气温≥12℃时作物增产率更为显著。该研究成果可为沼液在农业中的进一步推广应用提供理论支撑。

In order to explore the yield increase effect of biogas slurry application in China, this paper, based on the datum of 78 groups of field experiments published from 1999 to 2017, applied the Meta analysis method,the effect of biogas slurry application on crop yield under different conditions were quantitatively analyzed. The results showed that, in applying of biogas slurry, the increasing of crop yield was higher in northwest and north China than in southwest and east China. Different kind of crop were all effective for use of biogas slurry, the yield of wheat, corn, tomato and rice increased by 15.97%, 20.62%, 18.02% and 12.57%, respectively. At annual rainfall of ≥500 mm or <500 mm, the use of biogas slurry was all still effective for increasing crop yield. Comparing with the annual average temperature of < 12℃, the crop yield increase was more remarkable for annual average temperature of ≥ 12℃.