摘要
垂穗披碱草作为西藏种植面积最广的优质牧草之一,其种子生产问题在当地畜牧业生产中显得尤为重要。研究表明,不同时期施钾均可影响垂穗披碱草生殖枝数/m2、小穗数/生殖枝、小花数/小穗、种子数/小穗和千粒重。施钾可增加垂穗披碱草的实际种子产量。其中拔节期施钾种子实际产量为221.8 kg/hm2,与对照(ck)差异显著(p<0.05)。分蘖期施钾潜在种子产量和表现种子产量均最高,为2 803.8 kg/hm2和1 040.2 kg/hm2,与对照(ck)差异极显著(p<0.01)。
Elymus nutans is extensively cultivated in Tibet,its seed production is very important in the local livestock production.Field experiments were conducted in Dazi Station in 2009.The results showed that K fertilizer application at different stages could affect fertile tillers/m2,spikelets/fertile tiller,florets/spikelet,seed number/spikelet and thousand-seed weight of Elymus nutans,K fertilizer application increased the actual seed yield.The actual seed production of Jointing stage was 221.8kg/hm^2,and it was significantly different from ck at 0.05 level.The potential and manifestation seed yield in tillering stage were the highest for 2803.8kg/hm^2 and 1040.2kg/hm^2,and were significantly different from ck at 0.01 level.
出处
《种子》
CSCD
北大核心
2010年第12期9-12,17,共5页
Seed
基金
国家科技支撑计划子课题"优质牧草繁育研究与示范"(2007BAD80B01-01)
"中央级公益性科研院所基本科研业务费专项资金"(BRF060202)
关键词
钾肥
西藏
垂穗披碱草
种子产量
potassium fertilizer
tibet
Elymus nutans Griseb.
seed yield
