长期施肥对中国农田土壤溶解性有机碳氮含量影响的整合分析

doi:10.3864/j.issn.0578-1752.2020.06.014

Abstract

Abstract:

【Objective】The objectives of this study were to assess the in?uence of long-term fertilization on the soil dissolved organic carbon (DOC) as well as soil dissolved organic nitrogen (DON) under various use types, cropping systems and soil pH, to give management guidance on how to increase soil carbon and nitrogen in Chinese Cropland. 【Method】In current study, 72 literatures including effects of long-term fertilization on the contents of DOC and DON in Chinese Cropland from 2000 to 2019 were selected (510 dataset for DOC and 208 dataset for DON). The meta-analysis was used to investigate how the magnitude of the DOC and DON contents response to mineral fertilizer and manure application at three aspects: use types, cropping systems and soil pH.【Result】At national scale, the contents of DOC and DON in the fertilized soils were significantly higher than those in the no fertilized soils (CK). The increments of DOC and DON contents in manure applied soils (60%和93%) were 4.6 and 3.2 times higher than those in the soils with mineral fertilizers (13% and 29%). Under different use types, fertilizer application can significantly increase the contents of DOC and DON in upland soil, and the increments of DOC and DON contents improved by manure in upland soil were higher than those in upland-paddy soil. Furthermore, manure application could increase the content of DOC in mono-cropping (85%) compared with no fertilizer (CK), which was significantly higher than that in double-cropping (38%). For the alkaline soils (pH>7.5), the increments of DOC and DON contents in the treatment with manure amendment (85% and 162%) were higher than those in the neutral (6.5＜pH＜7.5, 48% and 70%) and acidic soils (pH＜6.5, 32% and 61%) compared with no fertilizer (CK), respectively. 【Conclusion】In summary, the application of manure (only manure or combined with mineral fertilizer) could significantly increase the contents of DOC and DON, but the effects varied greatly across various use types, cropping systems, soil pH. Therefore, the appropriate conditions of soil and environment should be taken into account when applying manure.

Key words: long-term fertilization, soil dissolved organic carbon, soil dissolved organic nitrogen, use types, cropping systems, soil pH, Meta-analysis

YaLin LI,XuBo ZHANG,FengLing REN,Nan SUN,Meng XU,MingGang XU. A Meta-Analysis of Long-Term Fertilization Impact on Soil Dissolved Organic Carbon and Nitrogen Across Chinese Cropland[J].Scientia Agricultura Sinica, 2020, 53(6): 1224-1233.

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References 46

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项目 Item	土壤溶解性有机碳DOC			土壤溶解性有机氮DON
项目 Item	不施肥CK	化肥 NPK	有机肥 OM	不施肥CK	化肥 NPK	有机肥 OM
样本数 No.	96	166	245	44	61	103
平均值 Mean	90.81b	97.19b	141.34a	12.36b	16.70b	24.39a
中值 Median	51.83	60.91	105.57	10.10	14.00	19.80
偏度 Skewness	2.10	1.27	1.16	1.80	1.86	1.56
峰度 Kurtosis	5.99	1.02	0.76	3.70	4.56	2.32
范围 Range	4.64—548.06	6.38—385.83	6.83—552.70	0.94—52.12	1.22—76.74	1.83—99.32

项目 Items		土壤溶解性有机碳 DOC			土壤溶解性有机氮 DON
项目 Items		不施肥 CK	化肥 NPK	有机肥 OM	不施肥 CK	化肥 NPK	有机肥 OM
利用方式 Use type	水田 Paddy	23b	7b	34b	61ab	25a	84ab
利用方式 Use type	水旱轮作 Upland-Paddy	26b	8ab	39b	35b	11a	52b
	旱地 Upland	49a	18a	76a	92a	39a	136a
熟制 Cropping system	一年一熟 Mono-cropping	56a	17a	85a	57a	23a	124a
	一年两熟 Double-cropping	25b	10a	38b	52a	36a	87a
	一年三熟 Triple-cropping	36ab	7a	56ab	30a	4a	55a
土壤pH Soil pH	pH＜6.5	23b	10b	32c	47b	25a	61b
	6.5＜pH＜7.5	30b	11ab	48b	40b	8a	70b
	pH>7.5	55a	19a	85a	111a	43a	162a

A Meta-Analysis of Long-Term Fertilization Impact on Soil Dissolved Organic Carbon and Nitrogen Across Chinese Cropland

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