摘要
在大田高产栽培条件下 ,对 2种穗型冬小麦品种的群体动态、穗花发育、子粒灌浆和产量构成特点进行了系统研究 ,并在此基础上提出了 2种穗型冬小麦品种实现超高产产量指标栽培管理的关键技术 ,即对于分蘖成穗率高、穗粒重较低的多穗型品种 ,应在保持适宜群体头数的基础上 ,采取拔节期追氮等措施能有效减少小花、子房退化 ,增加粒数和粒重 ,提高产量 ;针对大穗型品种分蘖成穗率低、穗粒重较高的特点 ,充分发挥其分化小穗、小花数多 ,穗粒重高的优势 ,并通过适当加大播量和适期肥水管理 ,促进分蘖成穗 ,增加有效穗数 。
It showed that differences in dynamic of population, development of spike and floret, and grain filling existed between two kinds of wheat cultivars in this paper. With regards to high ratio of spike to tiller and low ear weight in small-spike cultivars, nitrogen application at jointing stage increased grain number by decreasing aborted florets and ovaries. As for large-spike cultivars, low ratio of spike to tiller and insufficient spike number in the field resulted in low yield compared with small-spike cultivars, which are suggested that increasing sowing density, application of fertilizers and irrigation in fitted stage , increasing number of effective spike, reasonably could get more spikes and higher yield.
出处
《中国农业科技导报》
CAS
CSCD
2004年第4期46-50,共5页
Journal of Agricultural Science and Technology
基金
国家"十五"重中科技专项<粮食丰产科技工程>( 2 0 0 4BA5 0 2 A-0 6)
关键词
河南
小麦
产量形成
栽培技术
winter wheat
spike type
yield formation
key cultivation technique
