|Table of Contents|

Assessment of the Current Soil Pollution Situation in Apple Orchards of Shaanxi Province(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2015年11
Page:
192-196
Research Field:
Publishing date:

Info

Title:
Assessment of the Current Soil Pollution Situation in Apple Orchards of Shaanxi Province
Author(s):
ZHAO Zuo-ping1; 2
1.College of Chemical and Environment Sciences，Shaanxi University of Technology，Hanzhong，Shaanxi 723001;2.College of Resources and Environmental Sciences，Northwest Agricultural and Forestry University，Yangling，Shaanxi 712100
Keywords:
Shaanxi province; apple orchard; soil pollution; assessment
PACS:
S 661.106+.1
DOI:
10.11937/bfyy.201511048
Abstract:
To evaluate the current situation of soil pollution in apple orchard of Shaanxi province，and put forward countermeasures to solve the problems.Based on data collected from survey of orchard soil fertility，farmer interview and correlative literatures of soil pollution in apple orchard were conducted.The results showed that the average amount of used nitrogen fertilizer was 671 kg/hm2，and nearly was three times of nitrogen requirement for apple trees.The nitrate accumulation was more serious，which content was more than 200 mg/kg，and concentrated in the 80-200 cm.The mean value of single-factor indices of As，Hg and Ni were higher than 0.7，but it was less than 1.So the heavy metals contents in soil environment was in a good condition in Shaanxi apple orchard，and it was suitable for the demand of the green food apple production by the environment quality standard for soils in producing area of the green food.However，the mean value of single-factor indices of As，being at the warning limit of the environment quality standard for soils in producing area of the green food.Farmers lacked of spraying pesticides knowledge，unreasonable spraying caused soil pollution by pesticides in apple orchard.Therefore，it was probably a good way to reduce N fertilizer usage and to improve fertilizer utilization ratio.Application of more organic manure and combination of spring fertilization with suitable irrigation were critical for apple production.This achieved integrated management of nutrients and improved nutrient use efficiency.And controlled the dosage，limits，frequency of spraying pesticides，strictly limited the use of high toxic pesticide residue.Rein in ‘three wastes’，choosing orchard as far as possible to avoid existing pollution sources；application of phosphorus，potassium，organic fertilizer and the micronutrient fertilizer，should pay attention to harmful elements were dragged-in.

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Last Update: 2015-08-08