【作者】 李鹏；

【导师】 韩建国；

【作者基本信息】 中国农业大学 ， 草业科学， 2005， 硕士

【摘要】 本研究是2004年在结缕草(Zoysia japonica Steud.)主产地山东省胶州市进行的,对结缕种子生产技术进行了全面、深入的研究,结果表明: 1.抽穗期前 10～35天以前的低温和光照时间十分有利于结缕草小穗的分化和形成(r=0.9565)。结缕草的结实率、种子数与抽穗期的前5天和后15天积温、光照时数均呈正相关,差异显著。结缕草种子千粒重与积温呈负相关,而与光照时数呈正相关(r=0.9466)。光温互作对千粒重影响较大的是抽穗期后10～20天光温因子(r=0.90)。 2.适量施氮肥可提高结缕草生殖枝数和种子产量,以30kgN/hm~2(秋季施20kgN/hm~2,春季施10kgn/hm~2)处理效果最好,播种和分栽小区的生殖枝数分别为3553个/m~2、3043个/m~2,种子产量分别为789.81kg/hm~2、779.38kg/hm~2。随着施氮水平的提高,生殖枝数并未增加,反而降低。施氮还可提高结缕草的穗长、小穗数/生殖枝、种子数/生殖枝、千粒重及结实率。施氮肥提高了结缕草种子脱氢酶活性和酸性磷酸酯酶活性和种子活力。 3.在本试验条件下,结缕草种子的适宜收获期为盛花期后第36天,此时种子含水量为26%～28%。海青1号结缕草生殖枝数和种子产量明显高于海青2号结缕草的(P<0.01),因此,可优先用作种子生更多还原

【Abstract】 The study was conducted to thoroughly research on the technologies of seed production of zoysiagrass （Zoysia japonica Stoud.） in Jiaozhou, Shandong province in 2004. The results indicated that:1. The low temperature and sunlight during 10-35 days before heading were facilitated to differentiation and development of spikelets （r= 0.9565）. And the seed setting percentage, seeds per spike of zoysiagrass and the accumulated temperatures and sunlight hours during 5 days before heading and 15 days after heading was positive conelation and significantly different. But the thousand seed weight （TSW） of zoysaigrass and accumulated temperatures was negative conelation, however TSW and sunlight hours was positive conelation （r=0.9466）. The interplay of sunlight and temperature during 10-20 days after beading was sensitive to TSW of zoysiagrass （r=0.90）.2. The suitable rate of nitrogen fertilizer application could increase fertile tiller numbers and seed production. The rate of 30 kg N/hm2 （20 kg N/hm2 in autumn, 10 kg N/hm2 in spring） was the best. The fertile tiller numbers and seed yield in seeding and transplant plots were 3553 个/m、 3043个/m² and 789.81 kg/hm²、 779.38 kg/ hm². Further increase in N fertilizer rate decreased the fertile tiller numbers and seed yields. The spike length of zoysiagrass, spikelets per fertile tiller, seeds per fertile tiller, thousand seed weight and setting percentage were increased duo to N fertilizer applied. The dehydrogenase activity , acid phosphoesterase activity and seed vigor were improved by N fertilizer application.3. The optimal harvest time was the 36^th days after peak anthesis in our experiment, and when the seed moisture content was 26%-28%. The fertile tiller numbers and seed yield of ’Haiqingl’ zoysiagrass were higher than that of ’Haiqing2’ zoysiagrass （P<0.01）. So the ’Haiqingl’ zoysiagrass is prior to ’Haiqingl’ for seed production.更多还原