A Study on the Variation of Plant Nutrient Elements in Soils at the North of Longyou County,Zhejiang Province

doi:10.19657/j.geoscience.1000-8527.2019.05.12

Abstract

Abstract:

The concentration and their balance of nutrient elements in arable soils are of important influence on crop growth. Identifying the temporal and spatial change of nutrient elements in soils is a key task to monitor geo-chemical change of land quality. The temporal and spatial variation of nutrient elements in soils at the north of Longyou County was recognized through statistical and spatial analysis based on the two sets of data respectively obtained in 2008 and 2014 after eliminating systemic analytical bias. The results showed that the contents of N and K₂O in soils decreased and the net relative accumulation rates were -4.40% and -13.81% respectively during the past six years. The variation of B and P concentration in soils was not obvious. The accumulation rates of different nutrient elements in soils were mainly controlled by the types of soil and land use. For example, N content in paddy fields showed an obvious trend of enrichment but depletion in woodland, vegetable fields and dry land. P concentration in vegetable fields, garden fields and dry land presented significant enrichment, while in paddy fields shows a trend of depletion.

Key words: soil geochemical survey, plant nutrient element, temporal and spatial variation, north of Longyou, Zhejiang Province

CLC Number:

P595
X142

HE Ling, ZHOU Guohua, SUN Binbin, JIAN Zhonghua, HUANG Chunlei, KANG Zhanjun. A Study on the Variation of Plant Nutrient Elements in Soils at the North of Longyou County,Zhejiang Province[J]. Geoscience, 2019, 33(05): 1055-1062.

Figures/Tables 9

References 24

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测试指标	分析方法	检出限	单位	重复样合格率/%
N	氧化热解-气相色谱法(GC)	20	mg/kg	100
P	压片法X-射线荧光光谱(XRF)	5	mg/kg	100
K₂O	压片法X-射线荧光光谱(XRF)	0.05	mg/kg	99.5
B	发射光谱法(ES)	1	mg/kg	99.5

测试指标	分析方法	检出限	单位	重复样合格率/%
N	氧化热解-气相色谱法(GC)	20	mg/kg	100
P	压片法X-射线荧光光谱(XRF)	5	mg/kg	100
K₂O	压片法X-射线荧光光谱(XRF)	0.05	mg/kg	99.5
B	发射光谱法(ES)	1	mg/kg	99.5

变量	相似度	自由度	显著性
N(2008)-N(2014)	2.764	569	0.006
lnP(2008)-lnP(2014)	2.939	588	0.003
K₂O(2008)-K₂O(2014)	11.412	572	0
B(2008)-B(2014)	0.500	580	0.617

变量	相似度	自由度	显著性
N(2008)-N(2014)	2.764	569	0.006
lnP(2008)-lnP(2014)	2.939	588	0.003
K₂O(2008)-K₂O(2014)	11.412	572	0
B(2008)-B(2014)	0.500	580	0.617

指标	2008年数据				2014年数据						平均相对累积率/%		总相对累积率/%		净相对累积率/%
指标	平均值	变异系数	中位数		平均值		变异系数		中位数		平均相对累积率/%		总相对累积率/%		净相对累积率/%
N	1 420	0.28	1 427	1 359		0.32		1 358		6.69		-4.79		-4.40
P	543	0.34	503	587		0.45		522		20.64		3.85		2.74
K₂O	2.36	0.22	2.34	2.13		0.25		2.09		-7.13		-10.75		-13.81
B	66.05	0.21	65.20	65.90		0.22		65.31		1.51		0.17		0.96