季节性干旱条件下氮肥与密度运筹对鲜食糯玉米产量的影响

摘要

The main objective of this study was to reveal the growth and yield of waxy corn in different nitrogen fertilizer and density in seasonal arid region. Field experiments were conducted at jinxian country, Jiangxi province. Yield and yield components were determined and air temperature and rainfall were monitored. The results showed that drought was occurred in September, October and November in 2011. Fresh fruit spike production was increased gradually with increasing amount of density and nitrogen. Fresh fruit in 225 kg/hm2 nitrogen fertilizer and 60 000 plants/ha was highest in all treatments. It was increased by 32. 29% than none nitrogen treatment. Nitrogen agriculture efficiency of 175 kg/hm2 nitrogen with 52 500 plants/ha and 175 kg/ha nitrogen with 60 000 plants/ha were 10. 57 kg/kg and 11. 79 kg/kg, respectively. They were higher significantly than others. Nitrogen agriculture efficiency of 275 kg/hm2 nitrogen with 4 500 plants/ha was 3. 76 kg/ kg, and it was the lowest.%为探讨季节性干旱下糯玉米的高产栽培模式,本试验研究了氮肥和密度运筹下糯玉米的产量与氮肥农学利用率.结果表明,在9至11月的干旱条件下,随着密度和施氮量的增加,鲜果穗产量逐渐增加,在氮肥用量(225 kg/hm2)和6万株/hm2处理下玉米鲜果穗产量最高,比不施氮处理提高了32.29％.氮农学效率表现较高的为中施氮量(175 kg/hm2)、中密度(5.25万株/hm2)和中施氮量(175 kg/hm2)、高密度(6万株/hm2)处理,分别为10.57 kg/kg和11.79 kg/kg,表现最低的为高施氮量(275 kg/hm2)、低密度(4.5万株/hm2),为3.76 kg/kg.因此,在南方红壤地区,通过合理搭配氮肥量和种植密度,可以在季节性干旱下实现鲜食糯玉米的高产.