摘要
为了进一步研究不同栽培环境中春小麦的光合性能,在不同密度和施肥条件下,对呼市、巴盟河套灌区春小麦全生育期光合势(LAD)进行了系统观测。结果表明,春小麦高产群体光合势在整个生育期呈单峰曲线变化,峰值在孕穗至开花期。在适宜密度、氮磷钾肥适量配施下,全生育期总光合势可达到21×10~4～22×10~4m^2·d/667m^2,且孕穗期后维持较高水平,约占总光合势的45％～55％,保证了籽粒形成期光合产物的供应,因此其经济产量也最高。可见,在春小麦的生产实践中,创造良好的栽培条件,使群体光合势大小及其发展变化较合理是高产的关键。
The change of leaf area duration (LAD) of spring wheat during all growth stages was studied under different treatments of density and fertilizers in Huhhot and Hetao irrigating region of Bameng. The results showed LAD of spring wheat population changed as a curve with single peak. Its speak appeared from booting to flowering stage. Under proper density and N, P, K application, The total LAD could reach 21×104- 22×104 m2·d/667m2. LAD could sustain at such a high level after hooting stage, and taked up 45% - 55% of the total LAD, thus ensuring supplement of dry matter in the seed formation stage and get a high economical yield in the end. Therefore it was crucial to high yield that magnitude and proper development of population LAD, and an optimum cultivation condition must be created in the practice of spring wheat.
出处
《麦类作物学报》
CAS
CSCD
2003年第3期70-74,共5页
Journal of Triticeae Crops
基金
内蒙古自治区科技厅"九五"重大科技攻关项目(960101)
