Regulation of Soil Salinity by Vegetation Coverage in Urban Greenbelt Saline-alkali Land

doi:10.7525/j.issn.1673-5102.2022.01.007

Abstract

Abstract:

Soil salinization was a global problem， which not only seriously affected agricultural production， and also greatly threatened landscape and urban planning projects. In present study， different landscape combinations and fertility measures were used to investigate the adjustable mechanism of the vegetation coverage to the urban green belt saline-alkali soil in the Lanzhou New District. The results showed that “Aesculus chinensis Bunge + Catalpa bungei C. + Rosa rugosa Thunb.” landscape combination Ⅱ， treated with organic fertilizer and microbial inoculants，the average vegetation coverage reached to 70.06% during a growth season. And the topsoil desalination rate could reach to 53.51%， while the "bare land" was only 20.62% and 5.46% respectively. The pH value and electrical conductivity of the landscape combination Ⅱ decreased by 12.54% and 63.83%， respectively， while the “bare land” only decreased by 3.14% and 12.28%. Correlation analysis（P<0.05） shown that vegetation coverage was highly negatively correlated with soil salinity（r= -0.949）， but highly positively correlated with soil organic matter（r=0.887） and with total nitrogen（r=0.853） respectively. These results indicated that can effectively improve the salt content of saline-alkali soil in the Lanzhou New District， by increasing the vegetation coverage of the green belt and improving soil fertility.

Key words: vegetation coverage, urban green belt, soil salinization, landscape combinations, desalination rate

CLC Number:

S731.2

Xiaoli Peng, Wangze Wu, Juan Shen, Hongbin Cheng, Jiangtao He. Regulation of Soil Salinity by Vegetation Coverage in Urban Greenbelt Saline-alkali Land[J]. Bulletin of Botanical Research, 2022, 42(1): 62-70.

Figures/Tables 5

Table 1

Table 2

Table 3

Fig.1

Table 4

References 26

1	Pal D.Soil modifiers：their advantages and challenges［J］.Clay Research，2013，32（2）：91-101.
2	Bouraoui D，Cekstere G，Osvalde A，et al.Deicing salt pollution affects the foliar traits and arthropods’ biodiversity of lime trees in Riga’s street greeneries［J］.Frontiers in Ecology and Evolution，2019，7：282.
3	Moore J，Fanelli R M，Sekellick A J.High-frequency data reveal deicing salts drive elevated specific conductance and chloride along with pervasive and frequent exceedances of the U.S.environmental protection agency aquatic life criteria for chloride in urban streams［J］.Environmental Science & Technology，2020，54（2）：778-789.
4	李占君，张厚良，郭兴，等.不同改良措施对松嫩平原重度盐碱地土壤结构与元素组成、杨树叶片光合及生长状况影响差异研究［J］.植物研究，2019，39（5）：733-739.
	Li Z J，Zhang H L，Guo X，et al.Effects of different improvement measures on soil structure and element composition，photosynthesis and growth of poplar leaves in severe saline-alkali soils of songnen plain［J］.Bulletin of Botanical Research，2019，39（5）：733-739.
5	Motojima H，Yamada P，Irie M，et al.Amelioration effect of humic acid extracted from solubilized excess sludge on saline-alkali soil［J］.Journal of Material Cycles and Waste Management，2012，14（3）：169-180.
6	Novotny E V，Murphy D，Stefan H G.Increase of urban lake salinity by road deicing salt［J］.Science of the Total Environment，2008，406（1-2）：131-144.
7	Qadir M，Ghafoor A，Murtaza G.Amelioration strategies for saline soils：a review［J］.Land Degradation & Development，2000，11（6）：501-521.
8	Miyamoto S，Chacon A.Soil salinity of urban turf areas irrigated with saline water：Ⅱ.Soil factors［J］.Landscape and Urban Planning，2006，77（1-2）：28-38.
9	邢莹莹，李占君，祖元刚，等.重度盐碱地改良后土壤离子含量及粒径变化研究［J］.植物研究，2015，35（5）：786-790.
	Xing Y Y，Li Z J，Zu Y G，et al.Change of ion content and particle size of the modified severe saline-alkali soil［J］.Bulletin of Botanical Research，2015，35（5）：786-790.
10	肖弘扬，温国昌，林启美，等.冬春季植被残体覆盖对内蒙古河套地区盐碱土盐分的影响［J］.干旱地区农业研究，2018，36（2）：23-26，123.
	Xiao H Y，Wen G C，Lin Q M，et al.Effects of winter and spring plant residue mulching on saline soil salt in Hetao Inner Mongolia［J］.Agricultural Research in the Arid Areas，2018，36（2）：23-26，123.
11	崔士友，张蛟.秸秆和植被覆盖对江苏滨海盐土土壤盐分变化的影响［J］.农业资源与环境学报，2017，34（6）：509-516.
	Cui S Y，Zhang J.Effects of straw mulching and vegetative covering on soil salinity dynamics of salt affected soils in Jiangsu coastal region［J］.Journal of Agricultural Resources and Environment，2017，34（6）：509-516.
12	张蛟，崔士友.秸秆和植被覆盖对滩涂围垦区土壤盐分和肥力性质的影响［J］.中国土壤与肥料，2018（3）：128-135.
	Zhan J，Cui S Y.Effect of straw mulching and plant cover on soil salinity and soil fertility in reclamation area of tidal flats［J］.Soil and Fertilizer Sciences in China，2018（3）：128-135.
13	范富，张庆国，马玉露，等.不同植被覆盖盐碱地碱化特征及养分状况［J］.草业科学，2017，34（5）：932-942.
	Fan F，Zhang Q G，Ma Y L，et al.Alkalization characters and cnutrient status of different vegetation［J］.Pratacultural Science，2017，34（5）：932-942.
14	孙博，解建仓，汪妮，等.秸秆覆盖对盐渍化土壤水盐影响的试验研究［J］.水土保持通报，2011，31（3）：48-51.
	Sun B，Xie J C，Wang N，et al.An experimental study of straw mulching effects in water and salt in saline soils［J］.Bulletin of Soil and Water Conservation，2011，31（3）：48-51.
15	郭耀东，程曼，赵秀峰，等.轮作绿肥对盐碱地土壤性质、后作青贮玉米产量及品质的影响［J］.中国生态农业学报，2018，26（6）：856-864.
	Guo Y D，Cheng M，Zhao X F，et al.Effects of green manure rotation on soil properties and yield and quality of silage maize in saline-alkali soils［J］.Chinese Journal of Eco-Agriculture，2018，26（6）：856-864.
16	李玉，田宪艺，王振林，等.有机肥替代部分化肥对滨海盐碱地土壤改良和小麦产量的影响［J］.土壤，2019，51（6）：1173-1182.
	Li Y，Tian X Y，Wang Z L，et al.Effects of substitution of partial chemical fertilizers with organic fertilizers on soil improvement and wheat yield in coastal saline and alkaline land［J］.Soils，2019，51（6）：1173-1182.
17	肖洪浪.甘肃秦王川大规模农垦中土壤风蚀与养分、盐分变化［J］.土壤通报，1998，29（4）：148-150.
	Xiao H L.Soil wind erosion and nutrient and salt changes in Qin Wangchuan［J］.Chinese Journal of Soil Science，1998，29（4）：148-150.
18	缑倩倩，韩致文，屈建军，等.秦王川灌区农田土壤盐分离子特征分析［J］.土壤，2014，46（1）：100-106.
	Gou Q Q，Han Z W，Qu J J，et al.Analysis of farmland soil salinity ions in Qinwangchuan irrigated regions［J］.Soils，2014，46（1）：100-106.
19	鲍士旦.土壤农化分析：3版［M］.北京：中国农业出版社，2000.
	Bao S D.Soil and agricultural chemistry analysis：3^rd ed［M］.Beijing：China Agriculture Press，2000.
20	黎立群.盐渍土基础知识［M］.北京：科学出版社，1986.
	Li L Q.Basic knowledge of saline soil［M］.Beijing：Science Press，1986.
21	毕远杰，王全九，雪静.覆盖及水质对土壤水盐状况及油葵产量的影响［J］.农业工程学报，2010，26（S1）：83-89.
	Bi Y J，Wang Q J，Xue J.Effects of ground coverage measure and water quality on soil water salinity distribution and helianthus yield［J］.Transactions of the Csae，2010，26（S1）：83-89.
22	陈萍，何文寿.不同盐化土壤理化性质差异研究［J］.农业科学研究，2016，37（3）：36-39.
	Chen P，He W S.A study of soil physicochemical properties for different levels of salinization［J］.Journal of Agricultural Sciences，2016，37（3）：36-39.
23	王文杰，关宇，祖元刚，等.施加改良剂对重度盐碱地土壤盐碱动态及草本植物生长的影响［J］.生态学报，2009，29（6）：2835-2844.
	Wang W J，Guan Y，Zu Y G，et al.The dynamics of soil alkali-salinity and growth status of several herbal plants after krilium addition in heavy soda saline-alkali soil in field［J］.Acta Ecologica Sinica，2009，29（6）：2835-2844.
24	李昂，吴应珍，马明广，等.西北地区种植甘草对土壤次生盐渍化的影响［J］.水土保持通报，2016，36（6）：47-52.
	Li A，Wu Y Z，Ma M G，et al.Effects of glycyrrhiza uralensis plantation on soil secondary salinification in northwest China［J］.Bulletin of Soil and Water Conservation，2016，36（6）：47-52.
25	丁晓妹，李向阳.甘肃秦王川盆地灌后土壤盐分变化特征［J］.能源与环境，2014（06）：64-67.
	Ding X M，Li X Y.Changes of soil salinity after irrigation in Qin wangchuan Basin［J］.Energy and Environment，2014（6）：64-67.
26	张晓娜，蒙仲举，黄昕，等.荒漠草原不同植被覆盖下土壤粒度组成与速效养分特征［J］.内蒙古林业科技，2018，44（1）：37-40，55.
	Zhan X N，Meng Z J，Huang X，et al.Granulometric composition of soil and character of available nutrients with different vegetation coverage in desert steppe［J］.Journal of Inner Mongolia Forestry Science ＆ Technology，2018，44（1）：37-40，55.

样地 Sample sites	土层 Soil depths /cm	含盐量 Salinity content /（g·kg^-1）	pH值 pH value	电导率 Electrical conductivity /（ms·cm^-1）	有机质 Organic matter /（g·kg^-1）	全氮 Total N /（g·kg^-1）	全磷 Total P /（g·kg^-1）	全钾 Total K /（g·kg^-1）
1#	0~10	6.53d	8.15d	0.49b	7.63a	0.58a	0.57bc	23.72a
	10~30	5.94g	8.03e	0.29gh	4.14d	0.57a	0.63a	23.72a
	30~50	5.79f	7.92f	0.31fg	2.52g	0.23d	0.47c	21.71c
2#	0~10	6.89c	8.36b	0.45c	5.04c	0.33b	0.44d	22.71b
	10~30	6.23e	8.17d	0.39e	5.43b	0.33b	0.55b	23.73a
	30~50	6.13e	7.85g	0.27h	3.22e	0.30c	0.39e	21.24c
3#	0~10	7.22a	8.52a	0.52a	2.81fg	0.20e	0.33fg	20.72d
	10~30	7.12b	8.23c	0.39e	2.24h	0.21de	0.47c	19.72e
	30~50	7.32a	8.02ef	0.41d	1.51i	0.12f	0.31g	19.73e

景观组合 Landscape groups	施肥方式 Fertilization patterns	5月 May	6月 June	7月 July	8月 August	9月 September	10月 October	平均植被覆盖度 Average vegetation coverage /%
五角枫+花叶楸+鲁冰花 A. mono Maxim.+C. bungei+ L. polyphyllus Lindl.	CK	18.46eE	28.56eD	34.45fC	51.68fB	55.35fA	18.35fE	34.48f
	YFS	22.34cF	35.89dD	42.38dC	68.46dA	61.78dB	26.47dE	42.89d
	YF	20.45dE	30.56eD	38.47eC	62.56eA	58.47eB	22.58eE	38.85e
七叶树+花叶楸+四季玫瑰 A. chinensis Bunge+ S. bungei+R. rugosa Thunb.	CK	31.24bF	45.56cE	57.85cC	75.87cA	74.45cB	42.56cD	54.59c
	YFS	36.46aF	62.73aE	78.45aC	92.67aA	88.58aB	67.45aD	70.06a
	YF	32.46bD	52.45bC	68.43bB	82.48bA	82.67bA	55.36bC	61.98b
裸地 Bare land	CK	4.57gE	8.24fD	14.35iC	25.86iA	20.15iB	9.38iD	13.76i
	YFS	6.89fE	8.36fE	25.86gC	36.32gA	28.78gB	17.48gD	20.62g
	YF	5.87fF	8.26fE	22.43hC	38.46hA	25.43hB	12.43hD	18.81h

景观组合 Landscape group	施肥方式 Fertilization patterns	1~10 cm			10~30 cm			30~50 cm
景观组合 Landscape group	施肥方式 Fertilization patterns	处理前 Before treatment /（g·kg^-1）	处理后 After treatment /（g·kg^-1）	脱盐率 Desalination rate /%	处理前 Before treatment /（g·kg^-1）	处理后 After treatment /（g·kg^-1）	脱盐率 Desalination rate /%	处理前 Before treatment /（g·kg^-1）	处理后 After treatment /（g·kg^-1）	脱盐率 Desalination rate /%
五角枫+花叶楸+鲁冰花 A. mono Maxim.+C. bungei+L. polyphyllus Lindl.	CK	6.53g	5.62d	13.94	5.94c	5.28cd	11.11	5.79de	5.62c	3.00
	YFS	6.64f	5.02f	24.40	5.89c	4.82e	18.17	5.72e	5.26d	8.02
	YF	6.55f	5.42e	17.25	6.02c	5.26de	12.62	5.90cd	5.56cd	5.79
七叶树+花叶楸+四季玫瑰 A. chinensis Bunge+ S. bungei+R. rugosa Thunb.	CK	6.89d	4.75g	31.06	6.23b	5.05e	18.94	6.13bc	5.69c	7.18
	YFS	6.84e	3.18i	53.51	6.32b	4.41g	30.22	6.02c	5.05e	16.11
	YF	6.83e	3.85h	43.63	6.28b	4.46f	25.80	6.18b	5.38d	12.94
裸地 Bare land	CK	7.22b	7.42a	-2.77	7.12a	7.01a	1.54	7.32a	7.44b	-1.64
	YFS	7.34b	6.94c	5.46	7.14a	6.85b	4.06	7.35a	7.41b	-0.82
	YF	7.37a	7.12b	3.39	7.20a	7.05a	2.08	7.44a	7.52a	-1.08

	平均覆盖度 Average vegetation	含盐量 Salinity content	pH值 pH value	电导率 Electrical conductivity	有机质 Organic matter	全氮 Total N	全磷 Total P	全钾 Total K
平均覆盖度 Average vegetation	1	-0.949^**	-0.717^*	-0.536	0.887^**	0.853^**	0.472	0.642^*
含盐量 Salinity content		1	0.593^*	0.420	-0.740^*	-0.836^**	-0.366	-0.501
pH值 pH value			1	0.876^**	-0.748^*	-0.754^*	-0.840^**	-0.758^*
电导率 Electrical conductivity				1	-0.463	-0.632^*	-0.829^**	-0.768^*
有机质 Organic matter					1	0.769^*	0.492	0.630^*
全氮 Total N						1	0.552	0.732^*
全磷 Total P							1	0.416
全钾 Total K								1