The microporous membrane is a new type of plastic film newly developed and produced by the Drought Agriculture Center of Shanxi Academy of Agricultural Sciences. The thickness is 0.008mm, the width is 800mm, the micropore density is 5000 holes/m2, the hole spacing is 2cm, and the hole diameter is 1mm. The design permeable speed 5 mm/hour. The film not only has the effect of increasing the temperature and maintaining the moisture, but also has the effects of water seepage, air permeability and temperature regulation. The use of dry land has a high application value. First, the cultivation technology? Last year, straw returned to the field, autumn deep ploughing, mechanical farming 25 cm, 20 cm of livestock; before and after seizures, the top Ling rub grinding and protection; choose the best species, middle and early drought-resistant varieties of the best; full base fertilizer, phosphorus increase Stable nitrogen, nitrogen to phosphorus ratio of 1:0.8; timely sowing according to the public opinion; wide and narrow row planting, line width 80 cm wide, narrow line 40 cm; microporous membrane cover, the best use of film planter, can be completed at one time Fertilization, covering, sowing; 3000 strains of Mu Liumiao, weeding, weeding, timely harvest, straw returned. Second, increase production results? In 1998, the technology is divided into early and late maturing three varieties of supporting tests, test area of ​​50 acres. Test results: Early-maturing species Shoudan No. 1, yield 388.9 kg per mu, less coverage increase 218.3%; medium-ripe variety Yufeng Feng 58; per mu yield 433.3 kg, less coverage increase 271.3%; late-maturing species Danhuang 605, per mu 377.8 Kg, less coverage increase 300.2%. In 1999, the technology demonstrated 1,000 acres in the North Hu village. Under the natural conditions of continuous drought, the average yield per mu in the 1000-mu demonstration field was 338.4 kg, and the output increased by 255.4 kg, and the grain output tripled. In 2000, in order to verify the technology, the demonstration was continued in Beihu with a demonstration area of ​​200 mu and planted at the beginning of June. The supporting variety was Jindan 34 with an average yield of 286.9 kg per mu, which increased the production by 201 kg compared with the control field. Among them, the highest fertility yield reached 444.5 kilograms, setting the highest record for corn production in the North Hu village. The results of the three-year trial and demonstration show that the main factors for obtaining a bumper crop in the drought year are micro-porous membranes, which make full use of limited rainfall, followed by wide and narrow row planting, and selection of medium- and early-maturing drought-resistant varieties. Supporting measures have exerted the advantage of dry farming.
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