摘要
为了解施氮量与行距互作对小麦群体质量的调控效应,于2013-2014年在中国农业科学院中圃场试验田进行裂区试验,以强筋小麦济麦20和中筋小麦中麦8号为试验材料,设置三个施氮水平(150、210和270kg·hm-2)和两个行距水平(12和20cm),比较分析了不同施氮量和行距组合下旱茬强、中筋小麦群体茎蘖数、茎蘖成穗率、叶面积指数、干物质积累量及产量差异。结果表明,在行距一定的条件下,适当增加施氮量,济麦20和中麦8号生育后期群体茎蘖数和茎蘖成穗率均显著升高。两个小麦品种各生育时期叶面积指数均不同程度提升。随施氮量的增加,中麦8号干物质积累量显著增加,而济麦20生育后期干物质积累量显著下降。在210kg·hm-2施氮量下,增大行距后,济麦20和中麦8号各主要生育时期群体茎蘖数和叶面积指数均显著升高。在中高氮条件下,济麦20和中麦8号生育后期干物质积累量随行距的增大而增加。综合来看,旱茬条件下济麦20和中麦8号分别在210kg·hm-2施氮量、20cm行距和270kg·hm-2施氮量、20cm行距下能够获得较高的群体质量和产量。
In order to explore the influence of nitrogen application amount and row space on the popula- tion quality of winter wheat. The experiment was conducted on the Institute of Crop Science, Chinese Academy of Agriculture Sciences / Key Laboratory of Crop Physiological and Ecology, Ministry of Ag- riculture from 2013 to 2014. The main objective was to study the influence of nitrogen application a-mount and row space on population quality by using strong gluten wheat（Jimai 20） and middle gluten wheat（Zhongmai 8） in dry stubble land under high-yielding cultivation system. The main results were as follows：With the accumulation of nitrogen amounts under a certain row space, the tiller numbers and percentage of effective stems and tillers were all increasing significantly between Jimai 20 and Zhongmai 8. The LAI of different growth stages also increased in different degree of two wheat varie- ties. Increasing nitrogen amounts could improve the dry matter accumulation amount of Zhongmai 8. On the contrary, it could decrease the dry matter accumulation amount of Jimai 20. Increasing row space could improve the tiller numbers and LAI of Jimai 20 and Zhongmai 8 population under 210 kgN ~ hm-2. The dry matter accumulation amount of Jimai 20 and Zhongmai 8 were continuously in- creasing during late growth stage at middle nitrogen amounts and high nitrogen amounts respectively. Through comprehensive analysis of effects of nitrogen application amount and row space on population quality of wheat, the suitable combination of Jimai 20 and Zhongmai 8 were 20 cm with 210 kgN ·hm-2 and 20 cm with 270 kgN · hm-2,respectively in dry stubble land.
出处
《麦类作物学报》
CAS
CSCD
北大核心
2016年第7期906-912,共7页
Journal of Triticeae Crops
基金
国家现代农业小麦产业技术体系项目(CARS-3-1-26)
国家科技支撑计划项目(2013BAD07B09)
江苏省高校自然科学基金重大项目(13KJA210004)
关键词
小麦
氮肥
行距
群体质量
Wheat
Nitrogen
Row space
Population quality
