Conservation Agricultural Practices Impact on Soil Organic Carbon, Soil Aggregation and Greenhouse Gas Emission in a Vertisol

被引：10

作者：

Jayaraman, Somasundaram ^{[1
]}

Sahu, Meenakshi ^{[1
,2
]}

Sinha, Nishant K. ^{[1
]}

Mohanty, Monoranjan ^{[1
]}

Chaudhary, Ranjeet S. ^{[1
]}

Yadav, Brijesh ^{[3
]}

Srivastava, Lalit K. ^{[2
]}

Hati, Kuntal M. ^{[1
]}

Patra, Ashok K. ^{[1
]}

Dalal, Ram C. ^{[4
]}

机构：

[1] ICAR Indian Inst Soil Sci, Berasia Rd, Bhopal 462038, India

[2] Indira Gandhi Krishi Vishwa Vidyalaya, Dept Soil Sci & Agr Chem, Raipur 492012, Madhya Pradesh, India

[3] ICAR Directorate Mushroom Res, Chambaghat 173213, Solari, India

[4] Univ Queensland, Sch Agr & Food Sci, Brisbane, Qld 4072, Australia

来源：

AGRICULTURE-BASEL | 2022年 / 12卷 / 07期

关键词：

conservation tillage; no-tillage; reduced tillage; greenhouse gas emissions; soil organic carbon; carbon sequestration; WHEAT CROPPING SYSTEM; NO-TILLAGE; PHYSICAL-PROPERTIES; MATTER; WATER; MANAGEMENT; SEQUESTRATION; NITROGEN; ROTATION; RESIDUE;

D O I：

10.3390/agriculture12071004

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Conservation agriculture (CA), comprising of minimum soil disturbance and crop residue retention (>30%), with a diversified cropping system, has become increasingly popular around the world. It is recognized as a sustainable practice to improve soil health by augmenting key soil properties. However, scanty information exists about the effect of CA practices on soil organic carbon (SOC), aggregation and greenhouse gas emissions (GHG) in a vertisol. Thus, this study investigated the effect of CA practices on SOC, soil aggregation and GHG emission under soybean-wheat and maize-chickpea cropping systems in a vertisol in Central India. Treatment consisted of three different tillage practices, being conventional tillage (CT), reduced tillage (RT), and no tillage (NT) under four cropping systems viz., Soybean-Wheat, Soybean + Pigeon pea (2:1), Maize-Chickpea and Maize + Pigeon pea (1:1). Regardless of cropping system, the soil under NT and RT exhibited better aggregation (20.77 to 25.97% increase), and SOC (12.9 to 19.4% increase) compared to the CT practice in surface layers. The aggregate-associated C concentration increased with aggregate size, and it was highest with large macroaggregates and lowest with silt and clay fractions across different tillage and cropping systems. Higher SOC stock was recorded under NT (4.22 +/- 0.133 Mg C/ha) compared to RT (3.84 +/- 0.123 Mg C/ha) and CT (3.65 +/- 0.04 Mg C/ha) practices at 0 to 5 cm depth. Thus, the adoption of CA practices reduced CO2 emissions, while also contributing to increases in SOC as well as improvement in soil structure.

引用

页数：14

共 73 条

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