引用本文: 张岚，张玲卫，刘会良. 氮添加对荒漠草原一年生短命植物根系形态特征的影响及其生物量特征关系. 草业科学, 2020, 37(10): 2003-2011 doi: shu

Citation: ZHANG L, ZHANG L W, LIU H L. Effects of nitrogen addition on the root morphology and biomass characteristics of ephemeral plants in a cold desert. Pratacultural Science, 2020, 37(10): 2003-2011 doi: shu

氮添加对荒漠草原一年生短命植物根系形态特征的影响及其生物量特征关系

张岚 ^1, ,
张玲卫 ^{1,
,} ,
刘会良 ^2,3,4,

1.
重庆欢乐生肖 xinjiangnongyedaxuecaoyeyuhuanjingkexuexueyuan，xinjiang wulumuqi 830052
2.
zhongguokexueyuanxinjiangshengtaiyudiliyanjiusuohuangmoyulvzhoushengtaiguojiazhongdianshiyanshi，xinjiang wulumuqi 830011
3.
zhongguokexueyuantulufanshamozhiwuyuan，xinjiang tulufan 838008
4.
xinjiangshengtaiyudiliyanjiusuoyilizhiwuyuan，xinjiang xinyuan 835800

作者简介: 张岚(1995-)，男，甘肃天水人，在读硕士生，主要从事全球变化生态学研究。E-mail: ;

通讯作者: 张玲卫,

基金项目: 新疆自然科学基金项目(2016D01B019)

摘要: 氮沉降增加对陆地生态系统产生了巨大的影响，荒漠生态系统相比于其他生态系统更为脆弱，对氮沉降响应更加敏感。本研究以小车前(Plantago minuta)、小花荆芥(Nepeta micrantha)和毛穗旱麦草(Eremopyrum distans) 3种荒漠一年生短命植物为研究对象，设计5个氮添加处理，研究根系性状和地上、地下生物量对氮素增加的响应。结果表明: 1) 1.5、3、6、12 g·(m²·a)⁻¹浓度的氮添加对3种植物根系形态特征均具有显著影响(P < 0.05)。2) 1.5、3、6 g·(m²·a)⁻¹浓度的氮添加显著增加了3种荒漠短命植物地上、地下生物量(P < 0.05)，12 g·(m²·a)⁻¹浓度的氮添加会抑制小车前、小花荆芥的生物量积累，而对毛穗旱麦草无显著抑制作用(P > 0.05)。3) 3种短命植物地上、地下生物量特征与植物根系形态特征间存在相关关系，不同直径根系特征与地上、地下生物量间的相关性存在差异，且不同物种间也存在较大差异。因此，荒漠地区氮沉降持续增加可能改变短命植物生存策略，进而对短命植物层片结构产生影响。

关键词:

English

Effects of nitrogen addition on the root morphology and biomass characteristics of ephemeral plants in a cold desert

1.
重庆欢乐生肖 college of grassland and environment sciences, xinjiang agricultural university, urumqi 830052, xinjiang, china
2.
重庆欢乐生肖 state key laboratory of desert and oasis ecology, xinjiang institute of ecology and geography, chinese academy of sciences, urumqi 830011, xinjiang, china
3.
turpan eremophytes botanical garden, chinese academy of sciences, turpan 838008, xinjiang, china
4.
重庆欢乐生肖 yili botanical garden, xinjiang institute of ecology and geography, xinyuan 835800, xinjiang, china

Corresponding author: Lingwei ZHANG,

Received Date: 2019-03-16
Available Online: 2019-10-15

Abstract: Increased nitrogen deposition has a huge influence on terrestrial ecosystems. Desert ecosystems are more fragile than other ecosystems and are more sensitive to global change such as nitrogen deposition. In this study, three desert ephemeral species (Plantago minuta, Nepeta micrantha, and Eremopyrum distans) were used as the research subjects. Five nitrogen addition treatments were utilized to study the effects of aboveground and belowground biomass and root traits. The results showed that (1) 1.5, 3, 6, and 12 g·(m²·a)⁻¹ concentrations of nitrogen had a significant effect on the root characteristics of the three ephemeral plants (P < 0.05). (2) Nitrogen addition of 1.5, 3, and 6 g·(m²·a)⁻¹ concentrations significantly increased the aboveground and belowground biomass accumulation of the three desert ephemeral plants (P < 0.05); however, the 12 g·(m²·a)⁻¹ treatment inhibited the biomass accumulation of P. minuta and N. micrantha, whereas it had no significant inhibitory effect on E. distans (P > 0.05). (3) The aboveground and belowground biomass characteristics of the three ephemeral species were correlated with plant root morphological characteristics. The root characteristics of various diameters were different from the aboveground and belowground biomass correlations, and there were also large distinctions between the different species. Therefore, the continuous increase of nitrogen deposition in desert areas might cause changes in the survival strategies and community structure of ephemeral species, and further affect the synusia structure of ephemeral plants.

Key words:

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图 1 不同氮添加处理下3种短命植物总根系参数变化特征

Figure 1. 重庆欢乐生肖 Variation characteristics of total root parameters of three ephemeral plants under nitrogen addition treatments

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图 2 不同氮添加处理下3种短命植物0～1 mm根径根系参数变化特征

Figure 2. Variation characteristics of 0～1 mm root diameter parameters of three ephemeral plants under nitrogen addition treatments

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图 3 不同氮添加处理下3种短命植物 > 1 mm直径根系参数变化特征

Figure 3. 重庆欢乐生肖 Variation characteristics of > 1 mm root diameter parameters of three ephemeral plants under nitrogen addition treatments

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图 4 氮添加对3种短命植物地上、地下生物量的影响

Figure 4. 重庆欢乐生肖 Effects of nitrogen addition on aboveground and belowground biomass of three ephemeral species

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表 1 根系形态特征与生物量的相关关系

Table 1. Correlation between root morphological characteristics and biomass

植物 Plant	指标 Parameter	TRL	TRA	TRV	0～1 mm RL	> 1 mm RL	0～1 mm RA	> 1 mm RA	0～1 mm RV	> 1 mm RV
小车前 Plantago minuta	Bb	0.115	0.270^*	0.355^**	0.101	0.304^*	0.230	0.302^*	0.230	0.302^*
小车前 Plantago minuta	Ab	0.300^*	0.361^**	0.354^**	0.276^*	0.448^**	0.288^*	0.445^**	0.288^*	0.445^**
小花荆芥 Nepeta micrantha	Bb	0.127	0.369^*	0.378^*	0.096	0.319^*	0.351^*	0.308	0.351^*	0.308^*
小花荆芥 Nepeta micrantha	Ab	0.213	0.570^**	0.634^**	0.174	0.499^**	0.521^**	0.496^**	0.521^**	0.496^**
毛穗旱麦草 Eremopyrum distans	Bb	0.228	0.254^*	0.223	0.230	−0.022	0.268^*	-0.030	0.268^*	0.030
毛穗旱麦草 Eremopyrum distans	Ab	0.300^*	0.317^*	0.271^*	0.299^*	0.041	0.326^*	0.036	0.326^*	0.036
** 表示在0.01水平(双尾)上显著相关；* 表示在0.05水平(双尾)上显著相关。TRL: 总根长；TRA: 总表面积；TRV: 总根体积；RL: 根长；RA: 根表面积；RV: 根体积；Bb: 根系生物量；Ab: 地上生物量。　 ** and * indicates significant correlation at 0.01 and 0.05 levels (two-tailed), respectively. TRL: Total root length; TRA: Total root area; TRV: Total root volume; RL: Root length; RA: Root area; RV: Root volume; Bb: Belowground biomass; Ab: Aboveground biomass.

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重庆欢乐生肖shenyanghuagongdaxuecailiaokexueyugongchengxueyuan shenyang 110142

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氮添加对荒漠草原一年生短命植物根系形态特征的影响及其生物量特征关系

作者简介: 张岚(1995-)，男，甘肃天水人，在读硕士生，主要从事全球变化生态学研究。E-mail: ;

通讯作者: 张玲卫,

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Effects of nitrogen addition on the root morphology and biomass characteristics of ephemeral plants in a cold desert

Corresponding author: Lingwei ZHANG,

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