Effects of Vermicompost on Root Characteristics and Nitrogen Use Efficiency of Poplar Seedlings

XIAO Yong-qiang; JING Da-wei; XING Shang-jun; MA Hai-lin; DU Zhen-yu; LIU Fang-chun

doi:10.13961/j.cnki.stbctb.2014.03.052

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Effects of Vermicompost on Root Characteristics and Nitrogen Use Efficiency of Poplar Seedlings

- Effects of Vermicompost on Root Characteristics and Nitrogen Use Efficiency of Poplar Seedlings
- Bulletin of Soiland Water Conservation Vol. 33, Issue 3, Pages: 262-266(2014)
- 作者机构：
  
  1. 德州学院,山东,德州,253023
  2. 山东省林业科学研究院,山东,济南,250014
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2014.03.052
  CLC：
- Published：2014
- 稿件说明：
移动端阅览
XIAO Yong-qiang, JING Da-wei, XING Shang-jun, et al. Effects of Vermicompost on Root Characteristics and Nitrogen Use Efficiency of Poplar Seedlings[J]. Bulletin of Soiland Water Conservation, 2014, 33(3): 262-266.
DOI：

XIAO Yong-qiang, JING Da-wei, XING Shang-jun, et al. Effects of Vermicompost on Root Characteristics and Nitrogen Use Efficiency of Poplar Seedlings[J]. Bulletin of Soiland Water Conservation, 2014, 33(3): 262-266. DOI： 10.13961/j.cnki.stbctb.2014.03.052.

摘要

通过盆栽试验

研究了CF(单施化肥)、VC(蚯蚓粪)和VC+CF(蚯蚓粪和化肥各提供50%的氮)等处理对一年生欧美I-107杨根系形态特征、根系吸收面积及氮素利用率的影响。结果表明

与CF处理相比

VC+CF处理显著提高了杨树幼苗的根系总根长、比根长、根系表面积、根系体积和根尖数

而根系直径却明显降低

其中根系总根长分别比CK

CF和VC处理提高161.70%

52.80%和14.79%;同时

VC+CF处理还显著提高了根系总吸收面积、活跃吸收面积和根、茎、叶干物质量以及氮、磷、钾养分吸收量

并且使氮素利用率达到59.07%

分别比CF和VC处理提高57.35%和27.09%。此外

施肥对杨树幼苗地上部的增长速度明显快于根系。同VC+CF处理相比

VC处理对杨树苗根系形态特征、根系吸收面积及氮素利用率的影响较小。综合分析认为

蚯蚓粪与化肥配施对杨树幼苗的根系特性改善和养分吸收作用效果最佳。

Abstract

A pot experiment was conducted to study the root morphological characteristics

root absorption area and nitrogen use efficiency of poplar seedlings under the four treatments of CK (neither urea nor vermicompost was applied)

CF(100% of nitrogen was provided by urea)

VC(100% of nitrogen was provided by vermicompost)

and VC+CF(50% and 50% of nitrogen was provided by vermicompost and urea

respectively). Results showed that in comparison with the CF treatment

the VC+CF treatment significantly increased the total root length

root surface area

root volume and the number of root tips

but obviously decreased the root average diameter. The total root length in the VC+CF treatment was increased by 161.70%

52.80% and 14.79% in comparison with the CK

CF and VC treatments

respectively. At the same time

the VC+CF treatment dramatically increased the total absorption area and active absorption area of root system. Not only the dry matter accumulation of root

stem and leaf

but also the absorption amount of nitrogen

phosphorous and potassium was remarkably enhanced by the use of VC+CF. Furthermore

the nitrogen use efficiency was 59.07% in VC+CF treatment

indicative of 57.35% and 27.09% increases over the CF and VC treatments

respectively. Additionally

the growth rate of aboveground was significantly faster than underground owing to the application of fertilization. However

in the VC treatment

less effect on root morphological characteristics

root absorption area and nitrogen use efficiency of poplar seedlings was observed than that in the VC+CF treatment. In conclusion

vermicompost co-applied with inorganic fertilizer had better effect on root characteristics and nutrient uptake of poplar seedlings.

关键词

Keywords

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