氮添加对新疆野苹果幼苗枝叶大小的影响

doi:10.13866/j.azr.2022.01.20

Abstract

Abstract:

Malus sieversii is one of the ancestors of all cultivated apple trees in the world; therefore, it is regarded as a strategic genetic resource in China. However, its population has become seriously degraded. To conserve M. sieversii, it is necessary to understand the response of the plant to nitrogen addition. To determine the response of M. sieversii to nitrogen addition and provide a theoretical basis for population recovery, the twig traits of M. sieversii seedlings treated with different levels of nitrogen were analyzed using one-way ANOVA and allometric analysis. The N20 treatment promoted significant stem growth and significantly reduced the LAR and LAMR of M. sieversii; in contrast, the N40 treatment significantly reduced the LI of M. sieversii. The variation of branches and leaves of M. sieversii under nitrogen addition was not reflected in the biomass, but it was reflected in the morphological index. The low-and medium-nitrogen treatment groups tended to grow smaller and lighter leaves. The variation according to high-nitrogen treatment differed from that of the low-and medium-nitrogen groups. Appropriate addition of nitrogen fertilizer can improve the relationship between leaves and stem growth. In the process of planting seedlings, excessive application of nitrogen fertilizer should be avoided and fertilizer should be added appropriately. In the process of original habitat transplantation, the soil difference between habitats should be considered and fertilizer should be used in a targeted manner.

Key words: Malus sieversii, nitrogen addition, leaf-stem relationship, allometric scaling relationship, functional traits

HUA Zhaohui,TAO Ye,YAN Jingming,ZHOU Xiaobing,ZHANG Jing,ZHANG Yuanming. Effects of different levels of nitrogen addition on leaf-stem sizes of Malus sieversii seedlings[J].Arid Zone Research, 2022, 39(1): 210-219.

Figures/Tables 4

Fig. 1

Tab. 1

Tab. 2

Fig. 2

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	L	BD	SM	TLM	LN	SLM	TLA	LA	SLA	LI	LAR
BD	0.574^**
SM	0.818^**	0.747^**
TLM	0.639^**	0.653^**	0.841^**
LN	0.673^**	0.198^*	0.564^**	0.461^**
SLM	0.261^**	0.589^**	0.578^**	0.784^**	-0.101
TLA	0.694^**	0.624^**	0.846^**	0.972^**	0.537^**	0.725^**
LA	0.265^**	0.557^**	0.543^**	0.726^**	-0.121	0.963^**	0.725^**
SLA	-0.026	-0.294^**	-0.244^*	-0.392^**	0.089	-0.475^**	-0.193^*	-0.247^**
LI	-0.318^**	-0.656^**	-0.584^**	-0.688^**	0.145	-0.893^**	-0.637^**	-0.866^**	0.460^**
LAR	-0.522^**	-0.360^**	-0.459^**	-0.074	-0.278^**	0.100	-0.040	0.182	0.156	0.042
LAMR	-0.498^**	-0.247^**	-0.366^**	0.083	-0.295^**	0.277^**	0.043	0.273^**	-0.195^*	-0.125	0.933^**

X	Y		异速生长指数和截距						等速生长检验
X	Y	处理	R²	P	Slope(α)	SD	Intercept (logβ)	SD	F	P
SM	TLM	CK	0.878	0.000	0.864a	0.008	0.242a	0.001	2.611	0.127
		N10	0.675	0.000	0.996a	0.014	0.244a	0.001	0.001	0.976
		N20	0.705	0.000	1.065a	0.025	0.193a	0.001	0.257	0.618
		N40	0.606	0.000	0.848a	0.009	0.261a	0.001	2.635	0.113
L	TLA	CK	0.648	0.000	1.162b	0.048	2.572	0.050	0.972	0.340
		N10	0.400	0.000	1.948a	0.107	1.464	0.142	24.870	0.000
		N20	0.511	0.000	2.001a	0.153	1.251	0.210	21.901	0.000
		N40	0.378	0.000	0.909b	0.018	2.873	0.024	0.541	0.467
L	LN	CK	0.651	0.000	1.002ab	0.036	-0.041	0.037	0.000	0.988
		N10	0.390	0.000	0.939ab	0.025	-0.020	0.034	0.190	0.666
		N20	0.542	0.000	1.287a	0.059	-0.530	0.081	2.693	0.117
		N40	0.443	0.000	0.686b	0.009	0.285	0.012	10.171	0.003
BD	LA	CK	0.441	0.004	1.637a	0.163	1.917a	0.024	7.069	0.018
		N10	0.239	0.005	2.185a	0.176	1.789b	0.036	28.409	0.000
		N20	0.415	0.002	2.094a	0.206	1.818b	0.035	21.219	0.000
		N40	0.282	0.000	1.902a	0.093	1.916a	0.018	24.430	0.000
BD	LI	CK	0.564	0.001	-1.810a	0.073	1.859bc	0.023	13.601	0.002
		N10	0.413	0.000	-2.189a	0.075	1.966a	0.028	37.028	0.000
		N20	0.478	0.001	-2.010a	0.084	1.915ab	0.029	20.822	0.000
		N40	0.541	0.000	-2.131a	0.046	1.835c	0.014	55.652	0.000
BD	SLM	CK	0.584	0.000	1.906a	0.158	-2.079ab	0.025	17.188	0.001
		N10	0.254	0.004	2.417a	0.211	-2.226c	0.044	39.014	0.000
		N20	0.352	0.005	2.222a	0.259	-2.193b	0.043	23.022	0.000
		N40	0.323	0.000	2.188a	0.116	-2.081a	0.022	40.947	0.000

Effects of different levels of nitrogen addition on leaf-stem sizes of Malus sieversii seedlings

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