Uptake Preference of Different Forms of Nitrogen in the Community of Calamagrostis angustifolia in Sanjiang Plain

doi:10.11924/j.issn.1000-6850.casb2021-0230

Abstract

Abstract:

To explore the vegetation absorption preference of different nitrogen forms in Sanjiang plain, took the typical plant community in Sanjiang plain, Calamagrostis angustifolia community in meadow, as the research object, the labeled NH ⁺₄-N and NO^-₃-N were applied by¹⁵N tracer technology. The results showed that all the five species in the meadow community showed nitrate preference, and the dominant species of the community absorbed the most ammonium nitrogen and nitrate nitrogen. The preference of nitrate nitrogen in different organs of the dominant species was leaf>stem>root. Most of the exogenous nitrogen in the soil was absorbed by plants, and the residual ammonium nitrogen in the soil was more than the nitrate nitrogen.

Key words: Sanjiang plain, Calamagrostis angustifolia, nitrogen form, ¹⁵N tracer technology

CLC Number:

S610.30

Fu Xiaoling, Ni Hongwei, Liu Yingnan, Wang Jifeng, Wang Jianbo, Ma Fang. Uptake Preference of Different Forms of Nitrogen in the Community of Calamagrostis angustifolia in Sanjiang Plain[J]. Chinese Agricultural Science Bulletin, 2021, 37(35): 51-56.

Figures/Tables 8

References 19

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	全氮±SD	全磷±SD	全钾±SD	有机碳±SD
茎	5.92±0.67	1.24±0.15	12.62±1.25	213.07±12.48
叶	19.87±3.68	1.55±0.24	16.54±1.52	164.77±10.58
地上部分	9.69±1.34	1.07±0.10	10.49±0.98	311.45+18.37
地下部分	9.98±1.75	1.07±0.17	0.49±0.05	545.97±21.56

	全氮±SD	全磷±SD	全钾±SD	有机碳±SD
茎	5.92±0.67	1.24±0.15	12.62±1.25	213.07±12.48
叶	19.87±3.68	1.55±0.24	16.54±1.52	164.77±10.58
地上部分	9.69±1.34	1.07±0.10	10.49±0.98	311.45+18.37
地下部分	9.98±1.75	1.07±0.17	0.49±0.05	545.97±21.56

植物种类	¹⁵NH⁺₄-N±SD	¹⁵NO^-₃-N±SD
小叶章	300.6±28.9	607.6±46.7
翻白蚊子草	156.8±16.4	237.3±17.5
二歧银莲花	74.8±8.5	114.6±10.8
灰脉苔草	14.7±2.6	35.4±3.2
垂梗繁缕	12.0±1.8	17.5±2.0

植物种类	¹⁵NH⁺₄-N±SD	¹⁵NO^-₃-N±SD
小叶章	300.6±28.9	607.6±46.7
翻白蚊子草	156.8±16.4	237.3±17.5
二歧银莲花	74.8±8.5	114.6±10.8
灰脉苔草	14.7±2.6	35.4±3.2
垂梗繁缕	12.0±1.8	17.5±2.0

植物种类	取样时间/h	¹⁵NH₄⁺吸收比例	¹⁵NO₃^-吸收比例
小叶章	0	0.51	0.49
	24	0.46	0.49
	48	0.39	0.54
	72	0.38	0.62
二歧银莲花	0	0.50	0.50
	24	0.36	0.64
	48	0.38	0.62
	72	0.43	0.57
翻白蚊子草	0	0.51	0.49
	24	0.28	0.72
	48	0.28	0.72
	72	0.38	0.62
垂梗繁缕	0	0.51	0.49
	24	0.47	0.53
	48	0.35	0.65
	72	0.27	0.73
灰脉苔草	0	0.51	0.49
	24	0.42	0.58
	48	0.22	0.78
	72	0.37	0.63