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Ning County of corn planting and weather conditions


Benefits Latter requires an appropriate temperature. Optimum temperature for the period heading in 2528 ℃. L8 ℃ or higher than the temperature below 38 ℃ for flowers. Temperature 3235 ℃ 1 ~ 2h is the loss of pollen viability. During grain filling and maturity required to maintain the average temperature in the 2O ~ 24 ℃. Synthesis of organic substances beneficial to grain maturity ear Grain in the average temperature higher than 25 ℃ or less than l6 ℃ enzyme activities are affected. Negative nutrient accumulation and running. County in 2005 maize crop has been observed, usually in late April to begin planting, emergence in early May. Jointing in early June, late July heading, flowering, silking, 8 In late milk, mature in late September. The average maturity of corn germination temperature of 13 ℃ or so. Activity accumulated throughout the growing period is generally 2800 ~ C:: ~ right. Filling more drought-resistant maize is extremely slow. To water requires less, shooting, heading, flowering most of the water demand. Late less than normal. From the jointing to grain filling water demand of about 50% of the whole growth period. Before heading lOd to 20d after flowering maize to water-sensitive critical period, especially in the silking stage and the shedding of corn is more sensitive to shorter days of plants. Sunshine for too long can extend the normal development and maturation of corn; at high temperatures, short days, the growth period is significantly shortened. Therefore, the same variety of different sowing. Different growth duration. Corn requires heading in a 5-6h a day of sunshine, sunshine county the calendar year in late July at an average of 7.5h. Delay the normal development of three county corn maize production and climatic conditions,[link widoczny dla zalogowanych], the distribution of maize Ningcheng county due to climate conditions. Received in spring corn planting date :2008 -08-24 Lord. May to September is the county main maize growing period, this period of high temperature, light foot. Precipitation of 300 ~ 50Omm favorable. Less than 300mm for the water shortage. Greater than 500mm is too much water. On corn growth and yield formation of disadvantage. Therefore, according to our 300 ~ 500mm rainfall areas suitable for dryland cultivation of corn in late April rain to May this last sentence is planted, the seedling stage. Average temperature of 8 ℃ will be stable through the planting favorable. Stability benefit seedlings by 15 ℃. The county usually l3.2 ℃ sowing years or so, seedling stage at 16.5 ℃; 7 later this month for the flowering, pollination period. This period the temperature stabilized at 22 ~ 24 ℃ as appropriate. In late July the average temperature of 23.3 ℃. Conducive to the growth of corn. The county was generally planted in late April. Harvested in late September. Sowing period 2000-2006 the average temperature is 7 years late l2_3 ℃. The whole growth period ≥ lO ℃ accumulated temperature above were stable at 3000 ~ C above; heading stage, flowering, silking period usually ended in late July. Maize required less water and no water logging. May County, moderate rainfall. Soil moisture is not high, favorable maize growth and development. Corn tasseling after pay attention to maintaining adequate soil moisture. Temperature increase production of corn and strong. Only to meet the growth requirements of hot water. e generally grow in different regions, the same species or late sowing early sowing. General. From low altitude to high altitude, from south to north,[link widoczny dla zalogowanych], introduction, growth period to extend, on the contrary, growth period shortened. So, pay attention to selecting good varieties. Meteorological disasters on maize production have hail, strong winds, heavy rain, drought. Attention to prevention. 4 recommended varieties and high and stable yield of maize cultivation technology is the county mainly hybrid maize cultivation. As hybrid corn with high yields. Trends will remain there. Recommended varieties are as follows: Shen Dan 16. Great Wall 288 and so on. Integrated cultivation of high yield technology: the key should do a good job,[link widoczny dla zalogowanych], One that is suitable for sowing; Second Base Fertilizers and panicle weight that is heavy; three battles against the three disease control pest control: check that all seedlings seedlings four Guan, cultivating earth on the ridge (anti-down) off, light Shi Miao fat attack straw,[link widoczny dla zalogowanych], panicle weight related facilities, emasculation and pollination off. Corn is a tall, stems and leaves, vigorous growth. e dryland crop root system. Must first select the appropriate climate and soil environment suitable land for planting. Maize growth and create good environmental conditions, followed by cultivation to overcome the rough coarse species. Select more than one medium fertility soil, fine soil preparation, so flat, thin, net, from the furrow planting, improve field drainage ditch, anti-stain drought, timely sowing,[link widoczny dla zalogowanych], to ensure that all seedlings, rational close planting. 34 leaves the timely thinning, early tube precision tubes, for Early Express long; Shizujifei, early recovery Miaofei. 7 to 8 leaf fat stalk elongation facilities, l1l2 leaves Spike finished f) shell attack that fertilizer applied to nitrogen-based, with P and K, top dressing with cultivators earth, to the filling of applied Zhuang Li Fei: disease prevention and treatment of pests. Particular attention to anti-sheath blight and aphids, corn borer: pay attention to prevent premature aging. (London Editor Yvonne)
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