施肥量对高寒半干旱地区燕麦生长的影响

目的]研究施肥量对高寒半干旱地区燕麦生长的影响。方法]2009年在青海省共和盆地木格滩高寒半干旱地区种植燕麦,共设4个处理。对不同处理下燕麦的株高、分蘖数、主穗长、小穗数、穗粒数、千粒重、产量进行比较。结果]燕麦的出苗、分蘖、拔节、抽穗、开花期各处理一致,结籽期各处理相差2～6d,成熟期各处理相差13d。不同施肥处理对燕麦生长有明显的影响,株高、分蘖数、主穗长、小穗数、穗粒数随施肥量的增加而增大,千粒重则相反。各处理燕麦草籽产量和草捆产量变化一致,表现为施肥量与产量呈非正比关系;各处理燕麦收后茬地产量和生物产量变化相同,呈随施肥量的增多产量相应增大的趋势。结论]为提供优质、高产量的饲草提供技术依据和实践指导。

Impacts of Fertilizer on Avena sativa Growth in High and Semi-arid Regions

Objective]The aim was to study impacts of fertilizer on Avena sativa growth in high and semi-arid regions.Method]The experiment was conducted at the Mugetan in the Gonghe Basin,Qinghai Province,four controlled treatments were established.Observation items included plant height,tiller numbers,length of main fringe,spikelet numbers,grain numbers of spikelets,1 000-grain weight,production.Results]Seedling emergence,tillering,stem elongation,heading and flowering showed no differences among the four treatment,but maturing periods were changed significantly.Initially,seed setting periods showed differences varying from 2 days to 6 days,but later maturing periods showed differences that even reached 13 days.Fertilizer had significant impacts on Avena sativa development.If more fertilizer was added to Avena sativa,plant height,tiller numbers,length of main fringe,spikelet numbers,and grain numbers of spikelet would be increased.Seed and grass production changed in the same step,but their changes were not in a direct proportion with feritilizer amount.The more fertilizere was added,the greater oat production would be harvested.Conclusion]The study provided theory evidence for high production and high quality Avena sativa.