1 Major scientific and technological innovation contributions
(1) The study proposed that the effects of water and fertilizer, yield and water consumption during wheat growth were secondary paraboloids and planes, respectively. The reasonable input range of water and fertilizer was obtained, and the principle of maximizing profit in pursuit of actual production was determined. The water and fertilizer coupling optimization area was determined, which provided a reference for actual production in the area.
(2) The relationship between soil nutrient and rainfall and runoff was studied, and the mechanism of mutual interaction was revealed. The corresponding mathematical model was established, which laid a foundation for the study of soil nutrient loss with surface runoff in the arid area of Northwest China.
(3) A generalization and dynamic change treatment method for the formation of dense layer in intermittent infiltration of wave surge is proposed, and the coupling mechanism of water and fertilizer migration in intermittent infiltration is revealed. The index system and calculation method for comprehensive evaluation of surge irrigation water quality from water and fertilizer were put forward. The optimization model of surge irrigation technology elements was established. The synergistic effect of surge irrigation and fertilizer and the improvement of nitrogen fertilizer utilization rate were proposed. relationship.
The effects of different irrigation conditions on the nitrogen transport and transformation of the roots of the springs were studied. The effects of different irrigation conditions on the nitrogen transport and distribution of the springs were studied. The spring root irrigation technology was used, and the mathematical model of nitrogen infiltration of spring root irrigation with different experimental conditions was established.
2 Results application
Two grape water-saving experimental bases were established in the south of Shanshan and Shanbei in the Turpan area, and the research work on grape water requirement and water consumption characteristics, grape micro-irrigation technology screening and optimization were carried out. A set of technical regulations was formulated, more than 200 technicians were trained, and 1,280 mu of micro-irrigation and water-saving core demonstration area of mature age grape was built, which has important guidance and reference for the development of water-saving agriculture in Tuha Basin.
