The Influence of the Planting Patterns of Forest Shelterbelts along the Yellow River in the Hobq Desert on Under-forest Vegetation Diversity

doi:10.13466/j.cnki.lczyyj.2024.06.010

Abstract

Abstract:

To investigate the effects of different protection forest allocation modes on the diversity of understory vegetation along the Yellow River in the Hobq Desert,in order to provide a reference basis for optimising the planting patterns,improving the management effect of plantation forests in sandy areas,and consolidating the effectiveness of sand prevention and sand control.Five types of planting patterns of forest shelterbelts along the Yellow River in the Hobq Desert were used as the research objects[Populus simonii+Pinus sylvestris var.mongholica mixed forest(XZ),Populus simonii+Caragana korshinskii mixed forest(XN),Populus simonii+Corethrodendron lignosum mixed forest(XY),Populus simonii+Corethrodendron scoparium mixed forest(XH),and Populus simonii+Corethrodendron scoparium+Salix psammophila mixed forest(XHS)],and the under-forest vegetation communities were surveyed for species compositions by the application of the richness index(R),Shannon-Wiener diversity index(H'),Simpson dominance index(D)and Pielou evenness index(J)to analyse the diversity characteristics of the under-forest vegetation under different planting patterns.1)Plant species were relatively limited in the study area,with a total of 20 plant species in 8 families and 18 genera recorded,of which Fabaceae,Poaceae and Amaranthaceae dominated.2)The XN and XH modes significantly promoted the succession of under-forest shrub communities;XHS mode was more conducive to the succession of under-forest herbaceous layer.3)The highest biomass was found in the XZ mode,whereas the lowest was found in the XHS mode.This indicated that different configuration modes had significant effects on the organic matter accumulation and productivity of the community,with the XZ mode being more effective in improving the productivity of the community.4)There were significant correlations between stand factors,such as tree diameter at breast height(DBH),tree height(TH),crown spread(CR),and the diversity indices,cover,and density of the shrubs and herbaceous plants.By reasonably adjusting the structure of the tree layer,the growth and diversity of under-forest vegetation can be effectively improved,thus further optimising the ecological function of plantation forests.

Key words: Hobq Desert, planting patterns, plantation forests, species diversity, canopy configuration

CLC Number:

S718.5

GAO Yue, MENG Zhongju, YANG Yi, XIN Jing, MI Hongzhuo, WANG Zhiqiang. The Influence of the Planting Patterns of Forest Shelterbelts along the Yellow River in the Hobq Desert on Under-forest Vegetation Diversity[J]. Forest and Grassland Resources Research, 2024, (6): 81-90.

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References 27

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配置模式	株行距/(m×m)	主要林下植被	植被覆盖度/%	沙丘类型
XZ	2.5×2.5	紫穗槐(Amorpha fruticosa)、柠条锦鸡儿(Caragana korshinskii)、沙蒿(Artemisia desertorum)	>75	固定沙地
XN	3.5×3.5	沙蒿、虫实(Corispermum declinatum)、甘草(Glycyrrhiza uralensis)	>65
XY	2.0×3.0	柠条锦鸡儿、花棒(Corethrodendron scoparium)	>50
XH	3.0×4.0	羊柴(Corethrodendron lignosum)、虫实	<40	半固定沙地
XHS	4.0×4.0	沙柳(Salix psammophila)、花棒	<15	半固定沙地
CK				流动沙丘沙地

配置模式	乔木种类	平均胸径/cm	平均冠幅/cm	平均树高/cm	林分郁闭度/%
XZ	小叶杨(Populus simonii)、樟子松(Pinus sylvestris var.mongholica)、榆(Ulmus pumila)、刺槐(Robinia pseudoacacia)	13.43	269	447.14	40
XN	小叶杨、樟子松	10.50	238	598.75	32
XY	小叶杨	8.35	220	365.00	41
XH	小叶杨	8.10	225	450.00	24
XHS	小叶杨	8.25	215	422.50	15

科	占比/%	属	种
豆科Fabaceae	35	紫穗槐属Amorpha	紫穗槐Amorpha fruticosa
		锦鸡儿属Caragana	柠条锦鸡儿Caragana korshinskii
		羊柴属Corethrodendron	羊柴Corethrodendron fruticosum
		羊柴属Corethrodendron	花棒Corethrodendron scoparium
		甘草属Glycyrrhiza	甘草Glycyrrhiza uralensis
		苦参属Sophora	苦豆子Sophora alopecuroides
		刺槐属Robinia	刺槐Robinia pseudoacacia
禾本科Gramineae	15	芦苇属Phragmites	芦苇Phragmites australis
		狗尾草属Setaria	狗尾草Setaria viridis
		画眉草属Eragrostis	画眉草Eragrostis pilosa
苋科Amaranthaceae	15	雾冰藜属Grubovia	雾冰藜Grubovia dasyphylla
		虫实属Corispermum	虫实Corispermum hyssopifolium
		沙蓬属Agriophyllum	沙蓬Agriophyllum pungens
杨柳科Salicaceae	10	杨属Populus	小叶杨Populus simonii
杨柳科Salicaceae	10	柳属Salix	沙柳Salix cheilophila
菊科Compositae	10	蒿属Artemisia	沙蒿Artemisia desertorum
菊科Compositae	10	蒿属Artemisia	白莎蒿Artemisia blepharolepis
松科Pinaceae	5	松属Pinus	樟子松Pinus sylvestris var.mongholica
榆科Ulmaceae	5	榆属Ulmus	榆Ulmus pumila
大戟科Euphorbiaceae	5	大戟属Euphorbia	地锦草Euphorbia humifusa

层次	物种	生活型	XZ	XN	XY	XH	XHS
乔木层	小叶杨Populus simonii	落叶乔木	62.50	71.04	100.00	100.00	100.00
	樟子松Pinus sylvestris var.mongholica	针叶乔木	25.60	29.00
	榆Ulmus pumila	落叶乔木	5.70
	刺槐Robinia pseudoacacia	落叶乔木	6.10
灌木层	紫穗槐Amorpha fruticosa	灌木	72.85
	柠条锦鸡儿Caragana korshinskii	灌木	21.15	52.01
	沙柳Salix psammophila	灌木					52.65
	白莎蒿Artemisia blepharolepis	半灌木		21.23	27.17
	花棒Corethrodendron scoparium	半灌木		26.76		100.00	47.35
	羊柴Corethrodendron fruticosum	半灌木			72.83
草本层	苦豆子Sophora alopecuroides	多年生草本			7.71
	甘草Glycyrrhiza uralensis	多年生草本		10.23	7.43
	虫实Corispermum hyssopifolium	多年生草本	23.18	31.02	26.68	73.84	72.10
	芦苇Phragmites australis	多年生草本			7.14	4.44
	沙蒿Artemisia desertorum	多年生草本	59.69	28.98	23.74	19.53	11.71
	沙蓬Agriophyllum pungens	一年生草本					14.13
	画眉草Eragrostis pilosa	一年生草本	8.25
	狗尾草Setaria viridis	一年生草本		1.51	13.22	2.20
	地锦草Euphorbia humifusa	一年生草本	5.79	9.01	5.70
	雾冰藜Grubovia dasyphylla	一年生草本	3.10	19.25	8.39		2.05

群落类型	数量特征	XZ	XN	XY	XH	XHS
灌木群落	平均密度/(株/m²)	0.22± 0.08	0.39± 0.10	0.35± 0.08	0.33± 0.10	0.17± 0.06
	平均盖度/%	29.93± 9.19	31.83± 5.48	26.00± 7.55	31.00±10.39	24.33± 5.13
	平均高度/m	1.04± 0.23	1.12± 0.17	1.20± 0.27	1.31± 0.31	1.86± 0.15
草本群落	平均密度/(株/m²)	85.33±79.59	60.83±48.30	85.33±70.00	26.67±17.73	141.67±90.86
	平均盖度/%	8.52± 7.26	6.25± 4.19	4.68± 2.98	12.01± 7.77	18.04± 3.11
	平均高度/m	0.17± 0.09	0.13± 0.10	0.12± 0.09	0.12± 0.06	0.16± 0.08