高级检索
    陶梦, 王铁梅, 苏德荣, 吕世海, 陈俊翰. 氮肥对库布齐沙地柳枝稷目标产量的影响[J]. 北京林业大学学报, 2017, 39(7): 87-95. DOI: 10.13332/j.1000-1522.20160421
    引用本文: 陶梦, 王铁梅, 苏德荣, 吕世海, 陈俊翰. 氮肥对库布齐沙地柳枝稷目标产量的影响[J]. 北京林业大学学报, 2017, 39(7): 87-95. DOI: 10.13332/j.1000-1522.20160421
    TAO Meng, WANG Tie-mei, SU De-rong, LÜ Shi-hai, CHEN Jun-han. Effects of nitrogen fertilizers on the yield of switchgrass in Kubuqi Sandland, northern China[J]. Journal of Beijing Forestry University, 2017, 39(7): 87-95. DOI: 10.13332/j.1000-1522.20160421
    Citation: TAO Meng, WANG Tie-mei, SU De-rong, LÜ Shi-hai, CHEN Jun-han. Effects of nitrogen fertilizers on the yield of switchgrass in Kubuqi Sandland, northern China[J]. Journal of Beijing Forestry University, 2017, 39(7): 87-95. DOI: 10.13332/j.1000-1522.20160421

    氮肥对库布齐沙地柳枝稷目标产量的影响

    Effects of nitrogen fertilizers on the yield of switchgrass in Kubuqi Sandland, northern China

    • 摘要: 柳枝稷是一种生物量高、防风固沙效果好,具有良好发展前景的草本能源植物。为了将暖季型的柳枝稷引种到库布齐沙地,以柳枝稷品种“BL-1”为试验材料,研究了库布齐沙地柳枝稷目标产量(生物量、粗蛋白产量、中性洗涤纤维产量、酸性洗涤纤维产量)对施用尿素和硫酸铵两种氮肥的响应。硫酸铵和尿素各设置4个施氮水平0、75、150和225 kg/hm2,每个处理设置3个重复,分别于苗期、分蘖期和拔节期施入各试验小区,施入量分别为施氮量的1/5、2/5和2/5。在柳枝稷的拔节期、孕穗期、初花期分别测定其株高、茎粗、叶面积、地上生物量。结果表明:硫酸铵和尿素的施用均可以显著提高柳枝稷的产量,施用硫酸铵后,柳枝稷的产量随着施氮量的增加而呈现逐渐增加的趋势;施用尿素后,柳枝稷的产量随着施氮量的增加出现先升高后降低的动态趋势,且产量最高点出现在施氮量为150 kg/hm2时。在施氮量为75和150 kg/hm2时硫酸铵和尿素两种肥料对柳枝稷的产量的增加程度差异不显著;在施氮量为225 kg/hm2时,硫酸铵对柳枝稷的产量提高程度显著高于尿素。柳枝稷个体大小与叶面积是影响柳枝稷产量的重要因素,氮肥的施用对于柳枝稷生长的促进作用在拔节期最明显;对于柳枝稷叶面积的促进作用在孕穗期最明显;对于柳枝稷增产的促进作用在初花期最明显。硫酸铵相较于尿素更有利于促进柳枝稷的增产。

       

      Abstract: Switchgrass (Panicum virgatum) is a warm-season plant, with high biomass, good wind-preventing and sand-fixing effect, and is a herbaceous bioenergy plant with good prospects for development.In order to introduce the switchgrass to Kubuqi Sandland of northern China, a switchgrass variety BL-1 was used as an experimental material to research the responses of the yield (biomass, crude protein yield, neutral detergent fiber yield, acid detergent fiber yield) of switchgrass in Kubuqi Sandland to the application of urea and ammonium sulfate. Urea and ammonium sulfate were carried out with four treatments of nitrogen application rate(0, 75, 150 and 225 kg/ha) and three duplicates for each treatment. Urea and ammonium sulfate were applied directly into the experimental plots at the seedling stage, tillering stage and jointing stage, with the amount of 1/5, 2/5 and 2/5 of nitrogen application rate, respectively. The plant height, stem diameter, leaf area and aboveground biomass were measured at the jointing stage, booting stage and early flowering stage of switchgrass. The results showed that the application of urea and ammonium sulfate both could significantly increase the yield of switchgrass. The yield of switchgrass applied ammonium sulfate increased gradually with the increase of nitrogen application rate, while the yield applied urea increased first and then decreased, and the highest yield appeared at the nitrogen application rate of 150 kg/ha. There was no significant difference in the yield of switchgrass between urea and ammonium sulfate when the nitrogen application rate was 75 and 150 kg/ha. The yield of switchgrass applied ammonium sulfate was significantly higher than that applied urea when the nitrogen application rate was 225 kg/ha.The plant size and leaf area of switchgrass were important factors affecting the yield of switchgrass. The promotion of nitrogen fertilizer to the growth of switchgrass was the most obvious at jointing stage, to the leaf area of switchgrass was at booting stage, and to the rapidly increase production of switchgrass was in the early flowering stage. Compared with urea, ammonium sulfate was more conducive to the rapid promotion of switchgrass yield.

       

    /

    返回文章
    返回