钾肥对西藏垂穗披碱草种子产量的影响  

Effect of Potassium Fertilizer Application on Elymus nutans Seed Yield in Tibet

作　　者：田福平[1,2] 李锦华[1] 张小甫[1] 余成群[3] 王春梅[1] 张怀山[1] 黄秀霞[4] 

机构地区：[1]中国农业科学院兰州畜牧与兽药研究所,甘肃兰州730050 [2]农业部兰州黄土高原生态环境重点野外科学观测试验站,甘肃兰州730050 [3]中国科学院地理科学与资源研究所,北京100101 [4]西藏自治区农业技术推广服务中心,拉萨850000

出　　处：《种子》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)

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.

关 键 词：钾肥 西藏 垂穗披碱草 种子产量 

分 类 号：S143.3[农业科学—肥料学]