Abstract
The Soil Organic carbon (COS) is part of the organic matter which influences its properties. Currently, the topic is being researched. Therefore, the reserves in relation to the different vegetal coverings in the soils are studied. The objective of the study is to evaluate the changes in the (COS) with different managements of Canavalia ensiformis as green manure/crop coverage (AV/CC) at the Orchard Santiago 2 basic unit of production (UBPC). The production of fresh and dry biomass, the contribution of carbon from the biomass to the soil, the reserves of organic carbon CO, the total organic carbon as well as the organic carbon present in the humic substances were analyzed. The results showed a positive effect on the different Canavalia managements by increasing COS reserves in each treatment. A better response to treatments with incorporative and permanent Canavalia coverage in relation to the control in its initial state in the soil was also observed.
Highlights
Organic C has the function of being a nutrient source, increases cation exchange capacity (CIC), promotes soil aggregation, besides being a source of energy for microorganisms, is a temperature regulator and acts as Buffer regulating the abrupt changes of pH [1,2,3]
In the light of these times, existing research [4] does not rule out investigating the dynamics of organic carbon (CO) in soils as it establishes gains and losses associated with vegetation disturbances and management practices
Some studies [5] of different legumes make known that they increase the CO of the soil; Other authors [6] refer to the use of legumes to take advantage of them in producing phytomass; And to be used as a function of the sequestration of carbon, in the improvement of the content of the organic matter and the structure of the soil [7]; and others consider that the Canavalia ensiformis (AV/CC) improves the physical properties of the soil, mainly if it is incorporated, or is maintained permanently in the soil [8]
Summary
Organic C has the function of being a nutrient source, increases cation exchange capacity (CIC), promotes soil aggregation, besides being a source of energy for microorganisms, is a temperature regulator and acts as Buffer regulating the abrupt changes of pH [1,2,3]. The use of green manures is advocated for obtaining income in organic matter and for improving soil physical and chemical conditions with sustainability. Some studies [5] of different legumes make known that they increase the CO of the soil; Other authors [6] refer to the use of legumes to take advantage of them in producing phytomass; And to be used as a function of the sequestration of carbon, in the improvement of the content of the organic matter and the structure of the soil [7]; and others consider that the Canavalia ensiformis (AV/CC) improves the physical properties (quantitative and qualitative) of the soil, mainly if it is incorporated, or is maintained permanently in the soil [8]
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