Cover Crop Effects Increasing Carbon Storage in a Subtropical No-Till Sandy Acrisol

被引：50

作者：

Bayer, Cimelio ^{[1
]}

Dieckow, Jeferson ^{[2
]}

Carneiro Amado, Telmo Jorge ^{[3
]}

Folleto Eltz, Flavio Luiz ^{[3
]}

Beber Vieira, Frederico Costa ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Sul, Dept Soil Sci, Porto Alegre, RS, Brazil

[2] Dept Soil Sci & Agr Engn, Curitiba, Parana, Brazil

[3] Univ Fed Santa Maria, Dept Soil Sci, BR-97119900 Santa Maria, RS, Brazil

来源：

COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS | 2009年 / 40卷 / 9-10期

关键词：

Carbon management index; C stocks; legumes; no-till; particulate C; SOIL ORGANIC-MATTER; CLAY LOAM ACRISOL; MANAGEMENT INDEX; MUCUNA-PRURIENS; SYSTEMS; FRACTIONS; STOCKS; ACCUMULATION; CULTIVATION; OXIDATION;

D O I：

10.1080/00103620902820365

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The long-term (8-year) effects of summer (Mucuna spp.) and winter cover crops (Avena strigosa + Vicia sativa and Lolium multiflorum + Vicia sativa) in maize-based cropping systems on the total, particulate, and mineral-associated soil carbon (C) stocks in the 0- to 0.2-m layer of a no-till South Brazilian Acrisol (87gkg-1 clay) were evaluated. Annual C sequestration rates and the carbon management index (CMI) were calculated taking a fallow/maize (F/M) system as reference. A greater average C sequestration rate (0.68 Mg ha-1yr-1) and greater C lability (particulate C/mineral-associated C) were observed in the soil under the Mucuna system, and this was related to the higher biomass input in comparison to the winter cover crop systems. These cropping system effects on amount and lability of soil C were summarized through the CMI. The results highlight the potential of C retention in soils under warm and humid subtropical climate through the adoption of high C input summer cover crops in no-till production systems aimed at further improvement in soil and environmental quality.

引用

页码：1499 / 1511

页数：13

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