TAILIEUCHUNG - Summary of doctoral dissertation: Research on rice straw treatment solutions for improving the environment of paddy soil in the Mekong delta

Overall objectives: Research and propose the solutions to treat straw in the field so that reducing on-field rice straw burning and improving the soil properties in intensive rice soil. | MINISTRY OF EDUCATION AND TRAINING CAN THO UNIVERSITY SUMMARY OF DOCTORAL DISSERTATION Specialization Soil and Water Environment Code 62 44 03 03 RESEARCH ON RICE STRAW TREATMENT SOLUTIONS FOR IMPROVING THE ENVIRONMENT OF PADDY SOIL IN THE MEKONG DELTA Can Tho 2016 The dissertation was completed at College of the Environment and Natural Resources Can Tho University Scientific Supervisor Truong Thi Nga The dissertation will be defended before the council of the university level Meeting at At . . . . hour . day . . month . Year . . Opponent 1 Opponent 2 Opponent 3 Further information of the dissertation could be found at Learning Resuorse Center Cantho Unniversity. National Library of Vietnam CHAPTER 1 INTRODUCTION The necessity Nowadays the food needs have been increasing in Vietnam and particular in the Mekong Delta. The Mekong Delta with about million ha has contributed to ensuring strategic domestic food security and export. However rice yield tends to decrease in the intensification rice area in recent years. It is caused by improper soil use leading to degraded soils. In the case triple rice cropping has reduced the decomposition of organic matter and the activity of beneficial organisms in the soil so reducing ability to provide nutrients in soil for rice. Besides on-field rice straw burning did frequently after each harvest contracts affecting the source of organic matter and nutrients. In addition the straw burning has also affected to the environment and human health. Straw burning after harvest is one of the causes of environmental pollution greenhouse gas emissions such as CO2 CO NOx CH4. The recent studies have showed that organic fertilizer from straw of rice might be increase soil fertility contributing to stabilizing sustainable the intensification soil and rice yield. Cuu Long Delta Rice Research Institute reports showed effectiveness of organic by-products from agricultural waste products on reducing fertilizer and increasing .

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