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兴隆县12万亩玉米亩产突破千斤兴隆县去年种植12万亩指标化管理玉米,虽严重受灾,仍夺得了平均亩产507公斤的好收成,比对照田亩增197公斤,增产率高达63.5％,最高亩产达805公斤。他们的主要措施是: 1.选用优良品种。主要为京杂六号、中单二号、E28×330等品种。 2.以产定肥,看叶追肥。按亩产500公斤玉米所需养分及合理氮磷配比,亩施农家肥4000-5000公斤,底施二铵7.5-10公斤、复合肥15-25公斤,并在大喇叭口期(京杂六号展叶12片、中单二号展叶11片)追施碳铵75公斤。 3.适时播种,巧用雨水。为使玉米需水关键时期与自然降水相吻合,达到高产之目的,播种期至关重要。通过试验,南部京杂六号最佳播期为4月25日至5月5日,中、北部中单二号最佳播期为4月20日至30日。 4.依据品种定密度。最佳密度京杂六号为2600-2800株,中单二号为3000-3300株。 5.加强田间管理。及时中耕,后期并实行隔行去雄,以便提高光合效率,并节省养分,集中攻穗
Xinglong County, 12 acres of acres of corn breakthrough per kilogram Xinglong County, planted 12 acres last year, the index management of maize, although severely affected, still won the average yield of 507 kilograms of good harvest, compared with the control of acres by 197 kg, the yield as high as 63.5% , The highest yield of 805 kilograms. Their main measures are: 1. Selection of fine varieties. Mainly Beijing hybrid No. 6, No. 2 in the single, E28 × 330 and other varieties. 2. To produce fat, see leaf top dressing. According to the required amount of 500 kilograms of corn required per acre of nutrients and reasonable ratio of N and P, Mianshe farmhouse 4000-5000 kilograms, the end of the diammonium 7.5-10 kilograms, 15-25 kilograms of compound fertilizer, and in the big bell mouth Six leaves 12, leaflets on the second leaf 11) topdressing ammonium bicarbonate 75 kg. 3. Sow timely, clever use of rain. In order to make the critical period of water demand of maize coincide with the natural precipitation and achieve the purpose of high yield, the sowing period is very important. According to the test, the best sowing date of Beijing No.6 Hybrid is April 25 to May 5, and the best sowing date of Middle and North No.2 in April is 30 April. 4. According to the variety of fixed density. The best density of Beijing on the 6th is 2600-2800 strains, the number two in the 3000-3300 strains. 5. Strengthen field management. Timely cultivation, the latter and the implementation of interlacing to male, in order to improve photosynthetic efficiency, and save nutrients, focus attack