为明确夏玉米种植区不同种植方式下玉米机械化种、肥同播关键技术指标,以郑单958为供试品种,设不同玉米播种方式(铁茬直播和旋耕灭茬)、不同播种深度(播深5 cm、10 cm)和不同测深施肥种、肥距离(测深施肥种、肥距离15 cm、20 cm)等处理方式,研究了不同处理方式对玉米生长发育、干物质积累和产量等的影响。结果表明,铁茬直播+种子播深10 cm+种、肥距离20 cm模式下玉米产量最高,达到10987.6 kg/hm2,较铁茬直播+播深5 cm+种、肥距离15 cm处理模式产量增加14.9%(P<0.05)。该模式下单株干物质积累量达到319.12 g,叶面积指数整个生育期均保持相对较高水平。苗期土壤含水量旋耕灭茬处理高于铁茬直播处理,灌浆中期种、肥距离20 cm处理土壤含水量高于种、肥距离15 cm处理。铁茬直播+种子播深10 cm+种、肥距离20 cm为最佳的机械化精量施肥技术模式。%The aim of this study was to explore the key technological index of summer maize seeding and fertilizing simultaneously under different planting models. Zhengdan 958 was used as the experimental va-riety,and different planting models were designed, i. e. two sowing patterns ( adjacent stubble of direct seeding and rotary stubble,two sowing depths (5 cm and 10 cm) and two fertilizing distances(15 cm and 20 cm) ,to study the effects of above treatments on the growth and development,dry matter accumulation and grain yield of maize. The results showed that the pattern of adjacent stubble of direct seeding,10 cm sowing depth and 20 cm fertilization horizontal distance got the highest yield ( 10 987 . 6 kg/ha ) , which was 14. 9% higher than that of the pattern with direct seeding,5 cm sowing depth and 15 cm fertilization horizontal distance,reaching to a significant level. This might be due to the higher dry matter accumulation in middle and later period (319. 12 g),and the relatively high leaf area index during whole growth peri-od. The soil water volume of rotary tillage stubble was higher than that of direct seeding of adjacent stub-ble in seedling period. The water volume in 0—30 cm soil was higher in 20 cm fertilization horizontal dis-tance than in 15 cm one. The combination of direct seeding of adjacent stubble,10 cm sowing depth and 20 cm fertilization horizontal distance was the best model for mechanized precise fertilization technology.
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