不同氮肥配施对冷季型草坪草质量及土壤硝态氮积累的影响

发布时间：2018-05-05 21:23

本文选题：冷季型草坪草 + 速效氮肥　；参考：《河北北方学院》2017年硕士论文

【摘要】：为探讨氮肥对草坪草质量及土壤硝态氮积累的影响,并筛选适合张家口地区种植的草坪草种类,本研究于2016年7-11月在张家口市农业科学研究院试验基地开展速效氮肥和缓释氮肥不同比例配施对冷季型草坪草成坪质量、抗寒性及土壤硝态氮分布的影响试验。试验设草坪草种、施肥方式两个因素,草坪草选用高羊茅(Festuca arundinacea)、草地早熟禾(Poa pratensis)和多年生黑麦草(Lolium perenne)三个品种,施肥方式设速效氮肥(U)与缓释氮肥(S)比例为7∶3(A),6∶4(B),5∶5(C),4∶6(D),3∶7(E),不施肥为对照(CK)6个处理,采用完全区组试验设计,共18个处理,每个处理重复3次,共54个小区。结果表明:(1)三种草坪草中,草地早熟禾生长速度、地上生物量变化波动小,其他指标与多年生黑麦草及高羊茅差异不显著,可以减少草坪养护的成本投入。速效肥与缓释肥配施比例为4∶6和3∶7时,有利于维持草坪草较高的观赏质量,并减少草坪养护的成本投入。(2)三种草坪草中,高羊茅能够吸收利用土壤深层的硝态氮,有效减少硝态氮的淋溶,是三种草坪草中最适合减少硝态氮淋溶的草种。随着缓释肥所占比例的升高,0~40 cm土层中硝态氮含量升高,40~100 cm的土层硝态氮含量降低,淋溶风险减小。(3)当速效肥与缓释肥配施比例为7∶3时,草地早熟禾植株体内可溶性糖、MDA含量增加,抗寒性最强。
[Abstract]:In order to study the effect of nitrogen fertilizer on the quality of turf grass and the accumulation of nitrate nitrogen in soil, and to screen the species of lawn grass suitable for planting in Zhangjiakou area. The experiment was conducted in Zhangjiakou Research Institute of Agricultural Sciences from July to November 2016 to study the effects of different ratio of available nitrogen fertilizer and slow-released nitrogen fertilizer on turf quality, cold resistance and nitrate nitrogen distribution in cold season turfgrass. The experiment was carried out with two factors: grass species, fertilization method. Three turfgrass varieties, Festuca arundinacea, Poa pratenensis and Lolium perenne, were used in the experiment, and the results showed that there were two factors in the experiment, I. e., Festuca arundinacea, Poa pratenensis and Lolium perenne. The ratio of available nitrogen fertilizer (UU) to slow-release nitrogen fertilizer (S) was 7: 3: 3: 6: 4: 4: 5: 5: 5: 5: 5: 6: 6: 6, without fertilization as control (CK6). A total of 18 treatments were designed with a complete zone group design, each treatment being repeated 3 times, and a total of 54 plots. The results showed that the growth rate and aboveground biomass of POA pratensis had little change in the three turfgrass species, but there was no significant difference between other indexes and perennial ryegrass and tall fescue, which could reduce the cost of turf maintenance. When the ratio of available fertilizer and slow-release fertilizer was 4:6 and 3:7, it was beneficial to maintain the higher ornamental quality of lawn grass and reduce the cost of turf maintenance. 2) in the three kinds of turf grass, tall fescue could absorb and utilize nitrate nitrogen in the deep layer of soil. Reducing nitrate leaching effectively is the most suitable for reducing nitrate leaching in three turfgrass species. With the increase of the proportion of slow-release fertilizer, the nitrate nitrogen content in 40cm soil layer decreased and the leaching risk decreased, when the ratio of available fertilizer and slow-release fertilizer was 7:3, the nitrate nitrogen content in the soil layer of 40 ~ 100 cm was decreased, and the leaching risk was decreased when the ratio of available fertilizer and slow-release fertilizer was 7:3. The content of soluble sugar MDA in POA plants increased and the cold resistance was the strongest.
【学位授予单位】：河北北方学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S688.4

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