精量露播小麦的群体质量分析

Analysis of the population guality of wheat sown through precise surface seeding

以连续四年小区试验和多年多点同田大区对比试验为基础,分析了精量露播小麦的群体质量。精量露播栽培小麦表现出明显的早发生长优势、根系生长优势和持续生长优势,这三大生长优势显著提高了精量露播小麦的群体质量,形成了构建高光效能的高产群体的生物学基础。

The populatin guality of wheat sown through precise surface seeding is analysized based on a series of experiments on sowing practice for wheat establishment after rice. The growth superiorities of wheat with precise surface seeding on tillering and rooting were found in the exprriments. Based on the growth superiorities, the population quality of wheat was improved through precise surface seeding. The results were as follows：（i） precise surface seeding led to more tillers, especially eoleoptile tillers and lower-nodal tillers;（ ii ）the number of roots, total length of roots per plant and root activity at different stages got more superiorities through precise surface seeding; （iii） sustainable growth superiorities of wheat with precise surface seeding,such as LAI, colony quality,photosynthesis ability of colony,and accumulation of photosynthesis products ,were found.