อิทธิพลของระบบการปลูกพืชเชิงอนุรักษ์ต่อดัชนีคุณภาพคาร์บอนอินทรีย์ในดินบนพื้นที่ลาดชัน

Main Article Content

วรรธนัย อ้นสำราญ ณัฐพล จิตมาตย์ อรพิชา วรภักดี

Abstract

Abstract


Organic carbon quality in soils is a soil fertility index and use for sustainability assessment of cropping systems in sloping areas. This study aimed at investigating effects of conservation cropping systems and soil managements on soil organic carbon (SOC) quality indices on a sloping area in western Thailand by studying on conservation cropping systems in plot scale for three crop cycles. The results showed that the conservation cropping systems could help the soil preserve significantly higher available K and base saturation and affected the soil pH, total N, available P and soil organic matter were significantly decreased with time. On the other hand, conservation cropping systems significantly increased cation exchange capacity and mean weight diameter (MWD) of soil aggregates. Additionally, conservation cropping systems had shown no significant difference on soil organic carbon quality indices except particulate organic carbon. The intercropping with Leacaena hedgerow significantly increased particulate organic carbon content and aggregate mean weight diameter in soil. This implied that intercropping with Leacaena hedgerow can increase particulate organic carbon or organic carbon in soil macroaggregate which can promote stable aggregation in soil. Whereas, the effect of period of time on organic carbon quality indices revealed that total organic carbon in soil was significantly decreased with increasing cropping cycle, except labile SOC pools which tended to increase with increasing period of times of cropping cycle. 


Keywords: carbon sequestration; carbon cycle; organic carbon; slope area; conservation cropping systems

Keywords

Article Details

Section
วิทยาศาสตร์ชีวภาพ
Author Biographies

วรรธนัย อ้นสำราญ

ภาควิชาปฐพีวิทยา คณะเกษตร มหาวิทยาลัยเกษตรศาสตร์ วิทยาเขตบางเขน แขวงลาดยาว เขตจตุจักร กรุงเทพมหานคร 10900

ณัฐพล จิตมาตย์

ภาควิชาปฐพีวิทยา คณะเกษตร มหาวิทยาลัยเกษตรศาสตร์ วิทยาเขตบางเขน แขวงลาดยาว เขตจตุจักร กรุงเทพมหานคร 10900

อรพิชา วรภักดี

สำนักงานพัฒนาที่ดินเขต 10 กรมพัฒนาที่ดิน กระทรวงเกษตรและสหกรณ์ ตำบลหินกอง อำเภอเมือง จังหวัดราชบุรี 70000

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