Summary of phd thesis: Study on selection and technical measures to improve waterlogging ability of winter soybean in Hanoi

Objectives of the study: Identifying soybean lines and varieties tolerant to waterlogging for the development of Winter soybeans on wet soil in Hanoi; developing appropriate cultivation technical measures to improve the yield of Winter soybeans on wet soil after Summer rice harvesting in Hanoi.

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Summary of phd thesis: Study on selection and technical measures to improve waterlogging ability of winter soybean in HanoiMINISTRY OF EDUCATION MINISTRY OF AGRICULTURE AND AND TRAINING RURAL DEVELOPMENT VIETNAM ACADEMY OF AGRICULTURAL SCIENCES PHAM THI XUAN STUDY ON SELECTION AND TECHNICAL MEASURES TO IMPROVE WATERLOGGING ABILITY OF WINTER SOYBEAN IN HANOI Specialization: Crop Sciences Code: 9620110 SUMMARY OF PhD THESIS Hanoi - 2021The thesis was completed at :VIETNAM ACADEMY OF AGRICULTURAL SCIENCESSupervisors:1. Assoc. Prof. Dr. Tran Thi Truong2. Dr. Tran Danh SuuPhD thesis reviewer 1:PhD thesis reviewer 2:PhD thesis reviewer 3:The thesis was reported to the Thesis Committee at the Institutional level inVietnam Academy of Agricultural SciencesAt h, date , month , 2022.The thesis can be found at the libraries:1. National Library of Vietnam2. The Library of Vietnam Academy of Agricultural Sciences. 1 INTRODUCTION1. Necessity of the study Soybean or soya bean [Glycine max (L.) Merrill] belongs to the legume family(Fabaceae), order Fabales. Soybean is one of the important crops of high economicvalue with multiple uses, providing human feed, being a source of raw materials forlivestock, food industry, medicibe, cosmetics. In Vietnam, soybean is a long-standingcrop, having an important position in agricultural production and considered as a higheconomic efficiency crop in the strategy of crop restructure, increasing the value ofagricultural products. With short growth duration, soybean can be cultivated in manycrop seasons during the year, being ideal in crop rotation, intercropping, increasingof crop seasons and overlapping crop. Soybean production helps to increase land usecoefficient, create jobs and increase income for farmers. The soybean planting area in Winter - Spring 2019 of Hanoi reached 2.9thousand hectares over 3.4 thousand hectares planted for the whole year(accounting for 85.3%); the yield was 1.69 tons/ha, the output reached 4.9thousand tons out of 5.92 thousand tons/year (accounting for 83.05%). Soybeanhas become the main crop, occupying an important position in the Winter cropstructure of Hanoi as well as the Red River Delta provinces. However, the soybean production in Hanoi is still fragmented, dispersed, lowintensive investment, the application of new techniques is limited, and thesoybean production area is unstable and gradually shrinking. One of the mainreasons for low yield of soybeans is lack of collections of soybean varietiessuitable for the ecological conditions of Hanoi, as well as the appropriate andsynchronized technical measures. Specifically, it usually rains around the end of September, at the beginning ofWinter soybean crop in Hanoi. The rain is prolonged and sometime heavy whensowing soybean, the soil is always wet, the field can be flooded. Previouslyselected soybean varieties were mostly drought and cold tolerant varieties;research on flood-tolerant varieties has not been focused. Therefore, the selectionof soybean varieties that can be tolerant to waterlogging and adapted to the naturalconditions of Hanoi as well as identifying technical measures for Wintersoybeans soybeans on wet soil after rice harvesting to improve the yield andefficiency of soybean production is necessary. Based on the above mentioned necessity, we conducted the thesis: Study onselection and technical measures to improve waterlogging ability for Wintersoybean in Hanoi. The study on identification of soybean varieties tolerant towaterlogging with farming conditions in Hanoi along with other technicalmeasures will contribute to improving the yield and output of soybeans in Hanoi,and to raising incomes for farmers.2. Objectives of the study - Identifying soybean lines and varieties tolerant to waterlogging for the 2development of Winter soybeans on wet soil in Hanoi. - Developing appropriate cultivation technical measures to improve the yieldof Winter soybeans on wet soil after Summer rice harvesting in Hanoi.3. Scientific and practical significance of the study3.1. Scientific significance - The thesis findings provide valuable scientific basis for selection of soybeanlines and varieties capable of growing and developing well in waterloggingconditions and appropriate cultivation techniques for soybean to achieve highyields in wet soil conditions after Summer rice harvesting. - The thesis is a good reference for teaching, learning, scientific research,training and management of soybean production.3.2. Practical significance - Selection of soybean varieties with good growth, high productivity ...