The Pattern Foundation And Application Of Plastic Mulching In Wheat In Lvliang City

The wheat is one of the big staple food crops of Lv Liang city,Since founding of the nation,The whole city wheat production experienced the winding developing process back and forth,and obtained the considerable development. The per unit Chinese acre area yield grows from 35 kilograms early years of the new nation to 240 kilograms at present. Wheat production has played the extremely vital role for impelling the whole city agriculture rural economy development, for the stable society, prospering the market, improving the city and countryside inhabitant's quality of life. However, the water source deprivation and arid are still the most important question which restrict my city wheat production and even the national economy development,which are also the important reasons of my city 2/3 area arid land wheat depending on nature for a livelihood,and the reasonsof lower and unstable production for many years.This research uses the macroscopic material statistical method, the factor correlation analysis method, the fixed-point localization observation method, the field technology measure comparative method and the nature comparative method to carry on the synthetic study analysis. We adopt the means which promotes while studies,and summary induction for 1997—1999,three years experimental promotion situation.The purpose of founding Lv Liang city wheat planting mulching plastic cover pattern is to excavate maximum limitly potency from the arid land wheat the production, to enhances production benefit the arid land wheat, also to provide the theory and the practice basis for my city arid land wheat cultivation.We studied mulching plastic bunch planting, the membrane border drilling and membrane the bunch planting three kind of different covers patterns,and increasing effect in condition of the different sowing stage and the sowing quantity to 12 counties urban districts of Lv Liang city. The result indicated that the mulching plastic cover to cultivate wheat has obviously storing water, saving water, guaranteeing the soil moisture effect.The soil moisture content of the cover field wheat is 0.42-3.1% higher than the comparison field in different periods of growth; The wheat mulching plastic cover obviously increases the tempereture. In the different period duration 0-10 centimeters soil ground temperatures of the cover field is 0.3-3.5℃higher than of uncover field,for the wheat tectorial membrane improves the physics and chemistry character of soil, enhances the strength of illumination.It makes the wheat flag leaf strength of illumination enhance 74.5%,the illuminations of plant layer in the 30cm enhance 103.8% comparing with the comparison.and in the base 10 cm of adult plants illuminations strength ratio enhances 26.1% than the comparison.the result is that the cover emebrane speeds up the wheat growthand leads to improve coefficient increases 30.3% than the comparison.Especially, the flag leaf area increases 32%-38%compared with the comparison. The cover emebrane makes germination shifts 2-3 days earlier than the uncover, about 5 days earlier in the stooling stage,about 8 days earlier in the turning green stage,6 days earlier in lifting stage,4-7 days earlier in the ripening stageand raises utilization rate of natural precitation. The soil moisture contents the covered field during 0-50cm soil compares with the uncover field,which is 3% higher in the sowing,about 0.85% higher in the overwinter period,4.55%higher in the turning green stage and 2.75%higher in the jointing stage. The cover emebrane improves the cropping systems and delay the time of sowingand ripen in advance.the result gets 10-15 daysmoreand supplies extremely advantageous condition for the resowing fall crops' high production.it makes the mid-late maturing varietis take the place of preocious varietis.So,the cover ernebrane makes increase production potential of the seed get embodying and increase outstandingly in yield and get higher about 20%-30% than the uncover fields.The research summarized the usages of three kind of cover patterns under the specific cultivation environment technical regulations and the promoting safeguared measure in Lv Liang city. Meanwhile, on the base of the original two kind of patterns,the membrane side adding the strip bunch planting pattern on the membrane is used and suits promotion application in this local.