36results about How to "Reduce irrigation water" patented technology

The invention relates to an application of a highly alkalized soil improvement agent in improving soil. The highly alkalized soil improvement agent comprises the following raw materials in parts by weight: 88-92 parts of desulfurized waste, 1-3 parts of inorganic accelerator, and 5-11 parts of organic accelerator. The highly alkalized soil improvement agent provided by the invention has the beneficial effects that calcium ions in the desulfurized waste are used to replace exchangeable sodium on the densityalkalized soil colloid, thus reducing the alkalization degree of the densityalkalized soil; at the same time, the excellent pore structure and physical property of the organic accelerator are used to improve the physical property of the soil and the granular structure of the soil, reduce the pH value of the soil, and improve the soil fertility; the inorganic accelerator can also improve the granular structure of the soil; in addition, with auxiliary inorganic fertilizer and organic fertilizer, the soil fertility of the soil can be further improved so as to provide nutrient contents for plant growth. To sum up, by adopting the scheme in the invention, unbalance of nutritive elements in the soil can be effectively overcome, the land capability is improved, the soil is loosened, and the fertilizer efficiency is increased, so that the soil salinization phenomenon is fundamentally harnessed step by step.

The invention relates to a method for performing topdressing on winter wheat by sequentially irrigating and fertilizing. The method comprises the following steps of (1) applying base fertilizers and then performing rotary cultivation on lands or turning over and consolidating the lands before seeding of the winter wheat, constructing ridges, and building the ridges into perpetual ridges so as to bring convenience to irrigation and fertilizer application; (2) irrigating the winter wheat once when the winter wheat is in a turning green and jointing period by using 40-60m(3) water; (3) stopping irrigating, and uniformly spreading nitrogenous fertilizers in ground irrigation water after the depth of the ground irrigation water is reduced to 40-60mm, and performing topdressing. The heights of the perpetual ridges are 15-20cm, the width between each two adjacent ridges is 2-5 meters, and the quantity of the topdressing nitrogenous fertilizers is 30-40% of the quantity of nitrogenous fertilizers in a whole growth period of the winter wheat. The winter wheat is irrigated at first, after the depth of the ground irrigation water is reduced to 40-60mm, topdressing is performed, a mode of irrigation and topdressing is adjusted, the nutrition amount of urea which flows to positions below a root layer along with irrigation water is reduced, the available nutrient of the root layer of crops is increased, pollution on underground water due to irrigation is reduced, and the crop yield is improved.

The invention discloses a combined interception and removal system of nitrogen and phosphorus grid field control and drainage of farmland runoff and farmland percolation, which comprises field ridges, adjustable foldable overflow weirs, percolation tanks, ceramsite percolation layers, percolation slope protection, and underground levels The infiltration body, the straw shaft and the drainage channel; the field ridge is located around the grid field, and the adjustable foldable overflow weir is set between the field ridge and the drainage channel; the percolation tank is located at the outlet of the adjustable foldable overflow weir. There is a ceramsite infiltration layer, which is connected with the polymer fiber net infiltration slope protection; the underground horizontal infiltration body is below the plow bottom layer, and is composed of corrugated plastic drainage pipes wrapped with permeable geotextiles and crop straw infiltration materials. The shaft is placed above the dark pipe and connected with it, and the shallow straw shaft is placed between the dark pipes. The invention also discloses the application method of the above system. The invention closely links farmland surface hydrological regulation and storage with underground infiltration and drainage control, realizes the comprehensive and efficient interception and removal of farmland surface and underground runoff nitrogen and phosphorus, and the removal rate of pollutants exceeds 70%.

The invention discloses an arid and semi-arid region forest rainwater collecting and drought resisting cultivation method and belongs to the technical field of forestry engineering. The method is characterized in that ditching and mulching are performed along tree rows on a sandy or loam forest cultivation land to form a double-film-covered 'bamboo-like 'V'-shaped rain collecting ditch' structure, and arid and semi-arid region forest rainwater collecting and soil moisture conservation are achieved. The method has the advantages that natural rainfall utilization rate and soil water content can be effectively increased; forest planting survival rate, preserving rate and growth quantity can be increased greatly; a forest growing period is prolonged evidently, a forest development progress is accelerated, seedling cultivation time is shortened, economic forest can be promoted to form high-yield tree form in advance and enter a full bearing period, and orchard yield per unit is increased by above 30%; irrigation times and irrigation water quantity are reduced greatly, and production cost is lowered effectively; an individual tree can acquire evenly-distributed rainwater, overland runoff forming is prevented, and water and soil are conserved effectively; the method is easy to operate, free of pollution, low in cost, high in efficiency and long in valid time.