摘要
研究施肥与不同玉米品种本身的吸肥规律的关系,为提高氮素的利用率提供依据,在施磷钾肥相同的条件下,设置4个施氮量水平,对2个产量水平的玉米品种(黔单21和墨白94)茎叶含氮量的变化进行研究,结果表明,相对高产品种茎叶的含氮量总是高于相对低产品种。施氮量的多少,对相对高产品种拔节期茎叶含氮量影响较大,对相对低产品种整个生育期茎叶中含氮量影响较大。随着施氮肥量的增加,相对高产的品种茎叶的含氮量随之增加,而相对低产品种茎叶含氮量在施高氮条件下反而下降。
The variation of nitrogen content in stems and leaves of two maize varieties was analyzed under four nitrogen application levels and the same phosphorus and potassium application amount to study the relationship between application and nutrient uptake of different maize varieties for improving the nitrogen utilization rate.The results showed that the nitrogen content in stem and leaf of Qiandan 21 with relative high yield always was higher than that of Mobai 94 with relative lower yield.The nitrogen application level had a great impact on nitrogen content in stem and leaf of Qiandan 21 with relative high yield at jointing stage and on nitrogen content in stem and leaf of Mobai 94 with relative lower yield during the whole growth period.The nitrogen content in stem and leaf of Qiandan 21 with relative high yield increased with increment of nitrogen application amount,but nitrogen content in stem and leaf of Mobai 94 with relative low yield decreased under the higher nitrogen application amount.
出处
《西南农业学报》
CSCD
北大核心
2009年第5期1367-1369,共3页
Southwest China Journal of Agricultural Sciences
基金
国家支撑计划项目"旱地土壤质量调控关键技术集成研究与示范"[2006BAD5B06-06]
国际植物营养研究所科技项目计划"贵州省坡耕地养分管理"
贵州省农业科技攻关项目"贵州省中低产土改良关键技术研究与示范"[黔科合nz字(2007)3002]
农业部公益性行业(农业)科研专项经费项目子课题"鄂贵地区绿肥作物生产与利用技术集成研究及示范"[200803029-02-05]
关键词
施氮量
茎叶含氮量
玉米品种
Nitrogen application amount
Nitrogen content in stem and leaf
Maize
Variety
