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作 者:乔安海[1] 韩建国[1] 巩爱岐[2] 李伟[3] 王贇文[1] 秦歌菊[1] 郭树栋[2] 吴精明[2] 赵殿智[3]
机构地区:[1]中国农业大学草地研究所,北京100094 [2]青海省草原总站,西宁810008 [3]青海省三角城种羊场,刚察812300
出 处:《草地学报》2006年第1期48-51,56,共5页Acta Agrestia Sinica
基 金:农业部948项目(202099)资助
摘 要:2001-2002年研究氮肥对垂穗披碱草(E lym us nutans)种子产量和质量的影响。结果表明:施氮量以120 kg/hm2(秋60+春60)的效果最好,种子产量达1856 kg/hm2;施氮肥可提高生殖枝数、小花数/小穗、可育小花数/小穗和种子千粒重,但对小穗数/生殖枝影响不显著;施氮肥能提高早期成熟种子的发芽率、芽长、芽重及酸性磷酸脂酶的活性。Field experiments were conducted in Sanjiaocheng Stud Farm in two years(2001-2002), to test the effects of nitrogen fertilizer application on Elymus nutans seed yield and seed quality. Results show that the yield reached the highest rate of 1856 kg/hm^2 with 120 kg/hm^2 N application (Autumn 60+Spring 60). The fertilizer significantly raises the seed yield components, including fertile tillers/m^2, florets per spikelet, fertile florets per spikelet, and thousand-seed weight, though it does not influence spikelets per fertile tiller. The fertilizer also raises the early-mature seed germination rate, seedling length and weight, as well as the acid phosphoesterase activity.
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