Modeling the degree of coupling relationship between plant community diversity and soil properties on typical urban roads in Nanjing

doi:10.12302/j.issn.1000-2006.202006063

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (6): 119-126.doi: 10.12302/j.issn.1000-2006.202006063

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Modeling the degree of coupling relationship between plant community diversity and soil properties on typical urban roads in Nanjing

XU Jingyuan¹(), SHENG Qianqian¹, WANG Weixi¹, LIU Congzhe¹, ZHU Zunling¹^,²^,^*()

1. Co-Innovation Center for the Sustainable Forestry in Southern China,College of Landscape Architecture,Nanjing Forestry University,Nanjing 210037,China
2. College of Art & Design,Nanjing Forestry University,Nanjing 210037,China;

Received:2020-06-30 Accepted:2021-02-15 Online:2021-11-30 Published:2021-12-02
Contact: ZHU Zunling E-mail:xujingyuan@njfu.edu.cn;zhuzunling@njfu.edu.cn

Abstract

Abstract:

【Objective】 The plant-soil system has a complex mechanism of action. We aimed to reveal the limiting factors for the positive succession of plant communities on urban roads as well as screen for the best plant community types. We expect the results of this study to provide a theoretical guidance for soil management and protection, and provide data supports for redesigning urban road green landscapes. 【Method】 Three urban roads (Jiangbei Avenue, Honesty Avenue and Xianlin Avenue) that ranked high in the air pollution level in Nanjing, China, were regarded as research objects. Typical plant communities were selected for field surveys and the soil sampling analysis. According to the lifestyle of the plant, the community was divided into the following categories: single-layer, double-layer, three-layer and four-layer communities. The degree of coupling and interaction between plant community diversity and soil properties were measured using the gray correlation model. 【Result】 With the increase in community hierarchy, the level of species diversity showed an upward trend. The four-layer community had the highest soil water content, and the contents of soil organic matter, soil total nitrogen and soil available potassium showed an increasing trend with an increase in the community level. Soil properties were more likely to affect the uniformity of plant distributions than plant species, which experienced a minimal impact. Soil total potassium, soil bulk density, soil organic matter, soil total nitrogen, soil total phosphorus and soil pH were the main limiting factors for the vegetation growth. The correlation with plant factors was greater than 0.90 (a strong correlation). With the increase in community hierarchy, the degree of coupling of the plant-soil system increased. 【Conclusion】 Plant communities with high structural levels have a strong ecosystem stability. Considering environmental conditions and transportation needs, the recommendation for urban road greening is a four-layer community with a rich community structure.

Key words: urban road, community type, soil property, coupling relationship, Nanjing City

CLC Number:

S718

XU Jingyuan, SHENG Qianqian, WANG Weixi, LIU Congzhe, ZHU Zunling. Modeling the degree of coupling relationship between plant community diversity and soil properties on typical urban roads in Nanjing[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2021, 45(6): 119-126.

Figures/Tables 7

Fig.1

Table 1

The basic information of the plant community on Jiangbei Avenue, Honesty Avenue and Xianlin Avenue"

道路 road	样地编号 plot No.	植物组成 composition of plant	经纬度 latitude and longitude	坡度/ (°) slope	裸地率/% bare ground rate	群落类型 community type
江北大道 Jiangbei Avenue	A1	合欢+木樨+垂丝海棠+狗牙根	118°42'31″E, 32°09'27″N	3	13	3层
	A2	朴树+紫薇+石楠+垂丝海棠+紫荆+小叶女贞+海桐+红叶石楠+粉花绣线菊+红叶石楠+鸢尾+狗牙根	118°42'31″E, 32°09'28″N	4	3	4层
	A3	香樟+东京樱花+紫薇+金边黄杨+红叶石楠+金叶女贞+小叶女贞+海桐+狗牙根	118°42'40″E, 32°09'34″N	2	8	4层
	A4	香樟+朴树+紫薇+紫叶李+海桐+红花檵木+小叶女贞+金叶女贞+红叶石楠+杜鹃+金边黄杨+紫萼+狗牙根	118°42'33″E, 32°09'37″N	2	5	4层
	A5	香樟+栾树+构树+狗牙根+狗尾草	118°42'33″E, 32°09'38″N	2	18	3层
	A6	狗牙根	118°42'36″E, 32°09'48″N	2	9	单层
	A7	香樟+朴树+金边黄杨+海桐+红花檵木+杜鹃+狗牙根	118°42'28″E, 32°09'33″N	4	4	3层
诚信大道 Honesty Avenue	B1	栾树+柳树+梅花+木樨+桃+十大功劳+红花檵木+小叶女贞+珊瑚树+沿阶草+结缕草	118°51'05″E, 31°54'59″N	2	23	4层
	B2	柳树+栾树+香樟+木樨+夹竹桃+金边黄杨+十大功劳+黄杨+小叶女贞+珊瑚树+沿阶草+结缕草	118°50'52″E, 31°54'54″N	2	25	4层
	B3	杨树+栾树+东京樱花+紫薇+红花檵木+海桐+结缕草	118°50'36″E, 31°54'52″N	1	33	4层
	B4	梅花+桃+四季桂+海桐+杜鹃+红花檵木+结缕草	118°50'51″E, 31°54'56″N	2	12	3层
	B5	桃+椤木石楠+四季桂+杜鹃+南天竹+红花檵木+金叶女贞+结缕草	118°50'58″E, 31°54'59″N	2	9	3层
	B6	椤木石楠+四季桂+杜鹃+红花檵木+南天竹+结缕草	118°51'09″E, 31°55'03″N	2	34	3层
	B7	结缕草	118°51'14″E, 31°55'03″N	1	12	单层

Table 1

Table 2

Table 3

The analysis of soil physical and chemical characteristics under different types of communities (mean± SE)"

道路 road	群落类型 community type	含水率/% WC	容重/ (g·cm^-3) BD	pH	有机质质量分数/% OM	全氮质量分数/% TN	水解氮含量/ (mg·kg^-1) AN	全磷质量分数/% TP	速效磷含量/ (mg·kg^-1) AP	全钾质量分数/% TK	速效钾含量/ (mg·kg^-1) AK
江北大道 Jiangbei Avenue	单层	19.46± 1.28 A	1.81± 0.12 A	8.20± 0.21 A	0.455 1± 0.04 A	0.051 6± 0.01 A	13.71± 1.25 A	0.029 3± 0.00 A	23.97± 3.35 A	1.52± 0.19 A	103.62± 6.85 A
	3层	19.99± 0.34 A	1.51± 0.08 A	7.32± 0.46 A	1.181 3± 0.23 A	0.079 3± 0.01 A	50.85± 14.52 A	0.039 1± 0.00 A	21.59± 3.86 A	2.59± 0.43 A	116.50± 4.17 A
	4层	20.40± 1.07 A	1.71± 0.06 A	7.32± 0.32 A	1.486 2± 0.42 A	0.077 3± 0.02 A	46.63± 14.96 A	0.050 3± 0.00 B	26.67± 2.36 A	2.41± 0.33 A	143.89± 9.25 B
诚信大道 Honesty Avenue	单层	8.49± 0.78 A	1.59± 0.04 B	7.11± 0.07 A	0.87± 0.07 A	0.058 0± 0.00 A	41.42± 0.83 A	0.034 1± 0.00 A	4.09± 0.34 A	0.71± 0.03 A	103.19± 3.06 A
	3层	8.06± 0.29 A	1.44± 0.03 A	6.70± 0.26 A	1.52± 0.15 A	0.069 4± 0.01 A	71.96± 13.26 A	0.037 2± 0.00 A	19.68± 2.42 B	2.22± 0.26 B	109.56± 10.71 A
	4层	9.35± 1.27 A	1.50± 0.02 AB	6.87± 0.24 A	1.59± 0.39 A	0.085 6± 0.01 A	68.52± 10.99 A	0.034 3± 0.01 A	17.31± 2.78 B	1.84± 0.20 B	144.91± 12.68 A
仙林大道 Xianlin Avenue	单层	10.01± 0.92 A	1.14± 0.08 A	6.82± 0.12 A	0.97± 0.09 A	0.060 4± 0.00 A	24.02± 1.91 A	0.034 2± 0.00 A	4.94± 0.45 A	1.59± 0.02 A	60.14± 5.40 A
	双层	18.34± 0.43 B	1.32± 0.05 B	7.05± 0.09 AB	1.23± 0.05 AB	0.067 7± 0.00 AB	37.60± 2.73 B	0.040 2± 0.00 A	17.84± 1.56 B	2.24± 0.08 B	93.01± 8.53 AB
	3层	17.18± 1.28 B	1.24± 0.01 AB	7.23± 0.71 B	1.39± 0.09 AB	0.081 9± 0.00 AB	51.08± 5.33 B	0.038 9± 0.00 A	26.75± 4.18 B	2.31± 0.12 B	127.79± 19.89 B
	4层	21.57± 0.28 C	1.35± 0.01 B	7.05± 0.05 AB	1.64± 0.16 B	0.089 3± 0.01 B	40.72± 5.20 B	0.058 2± 0.01 A	22.04± 2.78 B	2.11± 0.24 B	184.95± 9.06 C

Table 3

Table 4

Table 5

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道路 road	样地编号 plot No.	植物组成 composition of plant	经纬度 latitude and longitude	坡度/ (°) slope	裸地率/% bare ground rate	群落类型 community type
仙林大道 Xianlin Avenue	C1	结缕草	118°54'51″E, 32°05'41″N	1	3	单层
	C2	海桐+小叶女贞+金边黄杨+红花檵木+红叶石楠+结缕草	118°54'53″E, 32°05'46″N	1	4	双层
	C3	香樟+银杏+柏木+结缕草	118°54'55″E, 32°05'45″N	3	2	双层
	C4	黄连木+香樟+木樨+杜英+紫薇+金边黄杨+杜鹃+红叶石楠+结缕草	118°54'58″E, 32°05'43″N	4	1	4层
	C5	黄连木+香樟+女贞+金边黄杨+红花檵木+结缕草+沿阶草	118°55'03″E, 32°05'49″N	3	2	3层
	C6	木樨+金叶女贞+红花檵木+沿阶草+结缕草	118°55'07″E, 32°05'50″N	1	3	3层
	C7	雪松+沿阶草+结缕草	118°55'10″E, 32°05'52″N	1	2	双层
	C8	香樟+紫叶李+木樨+金边黄杨+红花檵木+海桐+鸢尾+结缕草	118°55'11″E, 32°05'51″N	3	1	4层
	C9	雪松+木樨+垂丝海棠+金鸡菊+黑心金光菊+结缕草+紫花酢浆草	118°55'15″E, 32°05'54″N	1	3	3层
	C10	香樟+雪松+木槿+紫薇+金边黄杨+细叶芒+狼尾草+蒲苇+结缕草	118°55'21″E, 32°05'59″N	1	2	4层

道路 road	群落类型 community type	多样性指数diversity index
道路 road	群落类型 community type	R	H	J
江北大道 Jiangbei Avenue	4层	11.00	2.98	2.20
江北大道 Jiangbei Avenue	3层	5.67	1.53	1.74
诚信大道 Honesty Avenue	4层	10.00	2.77	2.33
诚信大道 Honesty Avenue	3层	7.00	1.67	1.50
仙林大道 Xianlin Avenue	4层	8.67	2.27	1.89
	3层	6.33	1.62	1.68
	双层	4.33	1.02	0.91

道路 road	指数 index	WC	BD	pH	OM	TN	AN	TP	AP	TK	AK
江北大道 Jiangbei Avenue	R	0.816 7	0.902 6	0.953 4	0.893 4	0.880 4	0.695 0	0.880 1	0.814 3	0.912 6	0.349 6
	H	0.752 5	0.985 6	0.916 7	0.980 5	0.965 2	0.644 5	0.964 8	0.753 4	0.987 0	0.337 6
	J	0.749 8	0.991 5	0.913 0	0.984 7	0.969 1	0.642 3	0.968 7	0.751 2	0.990 3	0.337 1
诚信大道 Honesty Avenue	R	0.973 1	0.884 2	0.969 2	0.880 6	0.864 2	0.542 7	0.863 8	0.862 1	0.893 7	0.352 2
	H	0.886 7	0.986 7	0.917 5	0.982 5	0.962 0	0.509 2	0.961 5	0.792 7	0.983 8	0.338 1
	J	0.882 4	0.987 3	0.912 8	0.984 5	0.967 1	0.507 8	0.966 6	0.789 4	0.985 3	0.337 5
仙林大道 Xianlin Avenue	R	0.786 9	0.934 3	0.956 0	0.929 5	0.913 4	0.668 0	0.913 2	0.823 3	0.944 7	0.344 7
	H	0.746 4	0.989 2	0.907 1	0.988 8	0.974 1	0.636 9	0.973 8	0.777 6	0.986 9	0.336 5
	J	0.744 9	0.990 3	0.904 9	0.993 2	0.976 7	0.635 5	0.976 3	0.775 8	0.985 3	0.336 2

道路 road	群落类型 community type	耦合度均值 mean value of coupling	协调类型 coordination type
江北大道 Jiangbei Avenue	3层	0.812 0	良好协调
江北大道 Jiangbei Avenue	4层	0.825 6	良好协调
诚信大道 Honesty Avenue	3层	0.825 6	良好协调
诚信大道 Honesty Avenue	4层	0.834 9	良好协调
仙林大道 Xianlin Avenue	双层	0.814 4	良好协调
	3层	0.820 7	良好协调
	4层	0.850 6	良好协调

Modeling the degree of coupling relationship between plant community diversity and soil properties on typical urban roads in Nanjing

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