Dryland wheat is short of water due to drought, poor water supply capacity, low yield and instability, but it has a great potential for increasing production. So how do you increase the yield of dryland wheat ?
Rotate in shallow depth and fill the soil with water. Deep ploughing can break the bottom layer of the plough, increase water permeability, increase water storage capacity, and promote root root sag and wide root absorption range, and improve water and fertilizer utilization. But due to deep plowing must whenever necessary, usually in early soil preparation, more precipitation, soil moisture should be deep enough years, tillage depth of 22 - 25 cm, and then harrow plow real, either a flat; farming after the drought little rain, often due to soil Untrue and seriously lost. Practice has proved that dryland wheat in 3--4 years, one year in case of enough moisture deep plowing, shallow plowing after 2--3 years, both to achieve the purpose of deep plowing soil improvement, but also increases the chances of heavy clay soil moisture is dry wheat yield Important measures.
Add fertilizer and adjust water with fertilizer. In dryland wheat fields, organic fertilizer should be applied as much as possible. Formulated with inorganic fertilizer, especially phosphorus fertilizer should be applied to improve soil, fertilize soil fertility, improve water storage capacity and water utilization rate. Lot general, organic fertilizer per acre 2,500 - 3,000 kg of ammonium bicarbonate and superphosphate 50 kg each, and, where appropriate, with an appropriate amount of potassium and fertilizer application; if Dissimilar, Mushi standard continuous nitrogen three or four years 40 — 60 kg, phosphate fertilizer 50 — 100 kg. In the high-yield wheat fields in dryland, a “one-boom†fertilization method can be adopted. That is, all the fertilizers can be combined into the soil and applied to the soil as a base fertilizer. The nitrogen fertilizer should be applied in a proper manner, and the phosphate fertilizer should be applied shallowly to cultivate the strong seedlings before winter.
Choose good varieties to breed water. Drought-resistant varieties have developed root system, leaves the narrow, thick-skinned table, small pores, respiration and transpiration weak, tillers, spike rate, etc., can better adapt to water less fat dry environment; Comparative data around investigation, planting drought-resistant varieties than not planting drought-resistant varieties, generally yield 20% --30%.
Sowing in moderation and timely, to save water by Miao ( Strain ) . The ability of automatic adjustment of dryland wheat population is poor, and the suitable sowing date and sowing amount range are correspondingly narrower than that of irrigated wheat . By timely and appropriate sowing, a reasonable water-saving and fertility group of seedlings, plants, ears and grains is established. Structure is the central link in increasing yield of dry wheat. Practice has proved that, in winter varieties daily average temperature should be stabilized at 16 ℃ - sowing 18 ℃, thus guarantee before winter than 0 ℃ effective accumulated, main stem reaches 6 - 8 tablets; weak winter varieties may be appropriately late sowing 3 – 5 days. In a suitable range of sowing, planting density per acre control about 150,000, seeding early partial reduction 1--2 trees, planting and late increase 2--3 strains, increased late crop Michael 20--25 Million plants ; the number of acres before the winter is generally controlled to 2 - 2.5 times the number of spikes in the final .
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