Effects of Tillage System and Soil Organic Matter Amendment on Growth, Yield of Pathumthani 80 Rice and Carbon Sequestration in Paddy Soil

Abstract

This study was conducted to determine the effect of tillage systems and soil organic amendments on rice growth, yield and carbon sequestration on paddy soil. The experiment was conducted by using 2x4 factorials in complete randomized design. The first factor was tillage systems (conventional tillage; to and minimum tillage; t1) and the second factor was soil organic amendments (mungbean; p0, sesbania; p1, sunhemp; p2 and rice straw; p3). The results demonstrated that adding organic matter derived from mungbean to the soil was the highest and significantly different of plant height and carbon stock in rice (P≤0.01). The tillage system and organic matter amendment was not significantly different of rice yield. However, tillage systems with a mungbean amendment tent to increased the rice yield. Soil organic matter was the highest in sumhep amendment in soil as following by sesbania, mungbean and rice straw, respectively. In addition, minimum tillage system can increase carbon sequestration in soil at 15 cm soil depth (P≤0.01).

Effect of Fertilizer Management in Combination with Soil Conditioner on Yield of Cassava Cultivated on Coarse-Textured Soil in Thailand

“…So insufficient addition and leaching of plant nutrient are major problems affecting cassava yield in northeast regions, ranging them the lowest among other cassava producing regions (OAE, 2014). Farmers should at least be aware of the long-term detrimental effect on soil productivity and should imply some soil management practices such as minimum tillage, closer plant spacing, mulching, fertilizer application, intercropping, planting of contour live barriers and soil conditioners application, which result in an improved soil structure that allow plant roots to absorb plant nutrient better (Putthacharoen et al, 1998;Buarach et al, 2014). It is very important to examine the appropriate soil conditioners that can reduce leaching of plant nutrient and maintaining water in coarse-textured soil (Chen et al, 2016).…”