蒙农根茎冰草新品系生长发育特性及种肥影响的研究

发布时间：2018-04-03 00:23

本文选题：蒙农根茎冰草　切入点：种肥　出处：《内蒙古农业大学》2017年硕士论文

【摘要】：2011年8月～2016年11月,在内蒙古农业大学牧草试验地和内蒙古锡林郭勒盟正蓝旗牧草种籽繁殖场,对蒙农根茎冰草生长发育和种肥处理进行了田间试验,结果表明:蒙农根茎冰草是一个较为晚熟、高产的新品系,生育期为129 d,平均干草产量8728.1 kg/hm2,生长第二年开花期行间开始出现根茎苗,逐渐形成根茎-疏丛型草群。种肥量对播种当年物候期和出苗率的影响较小。对第二年的物候期、株高和生长速度、干草产量和种子产量等影响较大。种肥量越大,对抽穗、开花、结实及根茎形成越有利;种肥量越大株高和生长速度的值越大;种肥量越大草产量越高。N1处理干草产量播种当年为1469kg/hm2,第二年为4100kg/hm2;表现种子产量达到1298.16kg/hm2,与对照相比增产46.3%。种肥量N1时,表现种子产量与潜在种子产量达到最大值,分别为 1298.16kg/hm2和2466.51 kg/hm2,根茎总长度为9.5m/m2,约为对照2.4m/m2的4倍。种肥量N2中含的碳水化合物最多,变幅在8.30%～13.30%,从开花期到蜡熟期节与节间的碳水化合物的含量的趋向一致,由高到低为N1N2N3CK。种肥量N1的净利润最高,为6580元/hm2,比对照高于1900元/hm2。
[Abstract]:From August 2011 to November 2016, a field experiment was conducted on the growth and development of rhizomatous ice grass and fertilizer treatment in Inner Mongolia Agricultural University and Zhenglan flag forage seed breeding site of Xilingol League, Inner Mongolia.The results showed that the rhizome of Mengnong was a new strain with late maturity and high yield, with a growth period of 129 days and an average yield of 8728.1 kg 路hm ~ (2) 路hm ~ (2). At the flowering stage of the second year of growth, rhizome seedlings began to appear and the rhizomate-sparse clumps were gradually formed.The amount of fertilizer had little effect on the phenological period and seedling emergence rate in the current year of sowing.The phenological period, plant height and growth rate, hay yield and seed yield were significantly affected in the second year.The higher the amount of seed fertilizer, the more favorable for heading, flowering, seed setting and rhizome formation, and the larger the amount of seed fertilizer, the greater the value of plant height and growth rate.The yield of hay treated with N _ 1 was 1469 kg / hm ~ 2 in the year of sowing and 4100 kg 路hm ~ (-2) in the second year, and the apparent seed yield was 1298.16 kg / hm ~ (2), which was 46.3% higher than that of the control.The apparent seed yield and potential seed yield reached the maximum of 1298.16kg/hm2 and 2466.51 kg 路hm ~ (-2), respectively, and the total length of rhizome was 9.5 m / m ~ (2), which was about 4 times of that of the control 2.4m/m2.The content of carbohydrates in N _ 2 was the most, which varied from 8.30 to 13.30, and the contents of carbohydrates in nodes and internodes from flowering to waxy maturity tended to be the same, from high to low to N _ 1N _ 2N _ 3CK.The highest net profit of N 1 was 6580 yuan / hm ~ 2, which was higher than 1900 yuan / hm ~ (2).
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S543.9

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