How to grow rice? Semi-dry type cultivation means that in a paddy field, a certain size is used to open a furrow ridge and the rice is planted on the water level line or the box surface on both sides of the top of the furrow, and the water is filled in the furrows and adjusted according to different stages of rice growth. The level of the water level, the implementation of a new method of infiltration irrigation. It is based on the ecological characteristics of farmland, using the principle of natural no-tillage and soil bio-thermodynamics theory, a new rice cultivation technology experimentally developed, suitable for winter paddy fields, especially in deep foot field, cold flood field, muddy field and large fertilizer field. Application. In recent years, the area has expanded rapidly. In 1987, Sichuan, Guizhou, Hubei, Guangdong, and Fujian provinces had promoted an area of ​​5,129,300 mu. The average grain yield per mu was 70 kg, with an added value of 55.50 yuan. Reasons for increased production in semi-dry cultivation: 1 Accelerate energy exchange between the soil and the outside world. Due to the increase in soil temperature after ridges, artificially changing the microtopography, thickening the mature soil layer where rice grows, expanding the total surface area of ​​the field (approximately 1/3 above) and the area of ​​the gas (the contact surface between soil and air is zero It becomes 410-470 square meters per mu. The exchange of energy between the soil and the outside world increases the area of ​​the soil that absorbs light and absorbs the heat of the solar radiation, and accordingly expands the area of ​​heat dissipation of the soil. In addition, the moisture content in the soil is higher than that of Hirata. Less, the soil heat capacity is reduced, the soil temperature is easy to rise (2 ~ 3 °C higher than flat), the temperature difference between day and night is also larger. It is advantageous to overcome the shortcomings of cold, yin, and rotten fields in early spring due to low temperature, and large temperature difference between day and night can reduce the respiratory depletion of rice plants, increase the accumulation of dry matter in the body, and lay a material foundation for rice growth. 2 Change the water movement form to coordinate the contradiction between water and gas. After ridging, the surface surface water from the original turbulent flow in the middle of the turbulent flow turns into a directional flow of furrows. In the upper ridge soil, the gravity water is basically eliminated, forming a form of movement dominated by capillary water rise, making the soil natural. The structure can be maintained, the soil will not dry out, it will not be dispersed by the water (flooding) into a muddy state, it will be porous, the air permeability will be obviously improved, and the air entering the soil will increase (Eh is higher than the flat field height 160- -180 millivolts, the contradiction between water and gas is more coordinated, the gasification potential is enhanced, and the total amount of reducing substances can be reduced by 75 - 80%, which is beneficial to eliminate the harm of toxic substances to rice roots. 3Strengthen soil enzyme activity, promote aerobic microorganisms, and increase soil fertility. Due to the significant improvement of soil thermal conditions and aeration conditions, the aerobic microorganisms in the soil are active. The total amount is 1-5 times more than that of flat fields, and the activity of hydrogen peroxide (H2O2) enzyme is high, reducing the contents of soil reductants to rice roots. Harm, increase the secretion of rice roots, thus enhancing the enzyme activity of the rhizosphere microorganisms, is conducive to the mineralization of organic matter in the soil and the transformation of mineral elements, the increase of effective soil nutrients, the rapid decomposition of organic nutrients, the rapid decomposition of organic nitrogen, strong nitrogen metabolism The ability of soil nitrogen supply is improved, and the transportation is also flexible. According to the measurement, the total available nitrogen and nitrate nitrogen increased, and the ammonium nitrogen decreased. Because nitrate-nitrogen can be easily washed and denitrified, ridge cultivation can not reduce the amount of nitrogen fertilizer, especially to re-apply surface fertilizer and apply fertilizer as early as possible. In addition, due to the small soil moisture content, pH value increased, soil available zinc content increased, there is a reduction in available phosphorus, should pay attention to increase phosphate fertilizer. Cable Reel,Water Hose Reel,Water Hose Cable Reel,Commercial Water Hose Reel NINGBO QIKAI ENVIRONMENTAL TECHNOLOGY CO.,LTD , https://www.water-hose-reel.com