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Dry film Semiarid mountains of wheat sowing date

Shopping, testing, demonstration and promotion. Tel: (0954) 6011773} (0) 13995146261. 78l767884422222544l57l38892l4l344345555. . 5lO26344ll89842768O63727l77734 Agricultural Science and Technology 2004 9 GansuAgr. Sci. andTechn. No. 9,200,427 autumn dry farming areas of corn and the effect of film Involved cultivation techniques (Seed Management Station Dingxi City, Gansu Dingxi 743000) Abstract: The County of Gansu Province in the south under the terrace to dry corn coated and bare in autumn comparison test ,[link widoczny dla zalogowanych], summed up the dry film of the drought in maize in autumn, temperature, yield. And from the selection block,[link widoczny dla zalogowanych], site preparation fertilization, mulching ridge, seed selection, seed treatment, proper early sowing, rational close planting, field management, introduced the film in autumn corn in dryland cultivation techniques. Key words: dry farming of corn; autumn film; effect; cultivation techniques CLC number: $ 513 Document code: B Article ID :1001-1463 (2004) 09-0027-02 recent years, with plastic film mulching cultivation technique promote the application of plastic film in the dry farming of corn production increase has played a significant role, showing good economic returns, as dry farming areas the main way to achieve high yield. However, in Gansu Province is a typical inland province, winter,[link widoczny dla zalogowanych], spring and more drought, 70% of annual precipitation is relatively concentrated in the summer and fall, mulched maize in dryland spring drought is often not on schedule due to planting, resulting in broken Seedlings Deficiency Lung, serious of maize growth,[link widoczny dla zalogowanych], development and production levels. To this end, the author in 2001 and 2003 in the terrace will be carried out dry County Yang Jixiang Autumn Film cultivation of maize, the results show that the fall of Autumn Film can build moisture, anti-drought, raised temperature, to ensure that maize the growth of moisture and temperature conditions, with significant yield. Now the film effect and cultivation techniques are described below. A drought-resistant corn Autumn Film, temperature,[link widoczny dla zalogowanych], soil moisture in autumn yield 1.1 storage, anti-drought, according to County in the southern mountain terraces will be covered and bare ground in autumn soil water content were measured before the fall of 2001 film ( In mid-October) 0 ~ 30cm (the same below) of soil water content was 185g/kg, covered by the autumn after the spring 2002 time (April 15), in autumn soil moisture was covered 148g/kg, but in the bare Soil moisture content was only 98g/kg, Autumn Film bare soil moisture higher than 47g/kg; 2002 film before the fall (mid October) the soil moisture content measured 164g/kg, after the 2003 film by the autumn When in spring (April 20) of the membrane under the soil Received Date :2004-05-31; revision date :2004-06-14 Author: Involved (1956 a), male, Gansu would rather people, agronomists, mainly engaged in crop breeding work. Phone: (O932) 3694603. . , -. 4 -,,-ae-. -At_-+-+-+-+ Table 2 sowing of winter wheat yield results hm, yield increased 33.3, ranking No. 1; October 2 equivalent yield of sown 5700kg/hm. , Yield increased 26.7%, ranking No. 2; September 20 sowing equivalent yield 5400kg/hm. Than the control yield of 20.0, ranking No. 3; to 9 October sowing lowest yield, equivalent yield only 4200kg/hm. , 6.7 compared with the control cut. The yield multiple comparisons, Sept. 20, Sept. 26, Oct. 2 3 sowing wheat production and control yield differences have reached a significant level, September 26 planting and 20 September sowing Yield differences were significant. 3.1 Summary and discussion 3 film obtained a key factor in the production of wheat is the appropriate choice of sowing date, by sowing results showed that most areas in southern Ningxia Longde County and to 26 September to 2 May for the film 1O The optimum sowing time of winter wheat. 3.2 Southern Ningxia is a typical arid and semi-arid rain-fed agricultural areas, open field of wheat production is low and unstable. Film is not only proper sowing of wheat yield large range, but more can be late sowing of wheat exposed to l0 ~ 12d, early harvest 8 ~ 10d, can adjust the farming season, after Wheat Harvest favor a substantial increase in crop yields, with good economic and social benefits . Country according to local climatic conditions, the film proper sowing of wheat as one of the key measures to increase production in order to get the best results. (This article Zebian: Cheng Yajun)