摘要
试验研究了不同氮肥施用量对毛白杨扦插苗干物质积累和保护酶活性的影响规律,以期为其扦插育苗中科学合理的施用氮肥作为底肥提供理论依据。试验在田间条件下,设置氮肥施用量分别为0(对照,N1)、9(N2)、18(N3)、27 g/株(N4)4个处理,3次重复。结果表明:N3处理根、枝条、叶、总干物质分别比对照提高了51.02%、40.41%、84.77%和55.82%,N4与N3之间无显著差异;5~9月N3 SOD活性分别比N2提高了11.91%、8.23%、9.75%、5.40%和7.10%,6、8月N4与N2之间无显著差异;N3 POD活性分别比N2提高了12.75%、18.46%、8.08%、11.25%和14.00%,5~8月N2显著高于对照;N3CAT活性分别比对照提高了39.73%、56.45%、27.41%、39.90%和47.09%,N2、N4均显著高于对照。综合分析认为,毛白杨育苗中氮肥作为底肥适宜用量为18 g/株。
The test was study the effects of nitrogen on dry matter accumulation and protective enzyme activity of cutting seedlings of Populus tomentosa,it was want to provide theoretical basis for scientific and rational application of nitrogen fertilizer as base fertilizer of cuttage propagation.The test was conducted under field conditions,and that set 4 treatment which nitrogen fertilizer application amount by 0(control,N1),9(N2),18(N3),27 g/plant(N4),repeat three times.The results show that:the root,branch,leaf and total dry matter of N3 treatment was higher than control by 51.02%,40.41%,84.77%and 55.82%,there was no significant difference between N4 and N3;from May to September,the SOD activity of N3 was higher than N2 by 11.91%,8.23%,9.75%,5.40%and 7.10%,there was no significant difference between N4 and N2 in June and August;the POD activity of N3 was higher than N2 by 12.75%,18.46%,8.08%,11.25%and 14.00%,N2 was significantly higher than control when in May to August;the CAT activity of N3 was higher than control by 39.73%,56.45%,27.41%,39.90%and 47.09%,N2 and N4 were significantly higher than the control.According to the comprehensive analysis,the suitable amount of nitrogen fertilizer used as base fertilizer in seedling raising of Populus tomentosa is 18 g/plant.
作者
丰兰青
Feng Lanqing(Shanxi Sanggan River Poplar High Yield Forest Experimental Bureau Jinshatan Forest Farm,Suzhou 038302)
出处
《湖北林业科技》
2019年第6期13-15,59,共4页
Hubei Forestry Science and Technology
关键词
毛白杨
氮肥
干物质积累
POD
SOD
CAT
Populus tomentosa
nitrogen fertilizer
dry matter accumulation
POD
SOD
CAT
