| 一种模拟土壤养分提取及及植物吸收的装置研究 |
| |
| 引用本文： | YANG Xu-Jian,LAI Yong-Lin,MO Jin-Yu,SHEN Hong. 一种模拟土壤养分提取及及植物吸收的装置研究[J]. 土壤圈, 2012, 22(6): 755-763. DOI: 10.1016/S1002-0160(12)60061-7 |
| |
| 作者姓名： | YANG Xu-Jian LAI Yong-Lin MO Jin-Yu SHEN Hong |
| |
| 作者单位： | Laboratory of Root Layer Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642 (China),Laboratory of Root Layer Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642 (China),Laboratory of Root Layer Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642 (China),Laboratory of Root Layer Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642 (China) |
| |
| 基金项目： | *1Supported by the National Natural Science Foundation of China (Nos. 31071847 and 31172026), the National Basic Research Program (973 Program) of China (No. 2007CB109303), the Ph.D. Programs Foundation of Ministry of Education of China (No. 20104404110016), the Foundation for High-Level Talents in Higher Education of Guangdong, China, and the Preferred Foundation for Returned Scholars, Ministry of Personnel of China (No. 2010412). |
| |
| 摘 要： | In situ evaluating the availability of soil nutrients has been a challenge. In this study, a new type of Device for Simulating Soil Nutrient Extraction and Plant Uptake (DSSNEPU) and its operating procedures were introduced. The device consists of a sampling tube, a fluid supply system, a low pressure system, a tube sheath and an elution cylinder. The sampling tube was firstly soaked in the solution of 0.5 mol L 1 NaHCO 3 and then buried into soils. The fluid supply system was connected to the sampling tube and the deionized water was supplied. During the period, low pressure system started a vacuum for 3 min every 10 min interval. After extraction, the sampling tube was removed and the nutrients on the sampling tube were eluted with 0.5 mol L 1 HCl. The elution solution was used for nutrient measurement. The amounts of P and K extracted by DSSNEPU reached the maximal values after 4 h. No significant increases of P and K were observed for longer extraction duration. The optimal temperature for extracting P and K was 30 C in this experiment. Extracted P and K were increased by 83.3% and 84.6% with the employment of low pressure system in comparison to those without employing low pressure system. Correlation analysis indicated that P and K extracted by DSSNEPU were highly correlated with those by conventional chemical extraction and by plant uptake. The above results suggest that this device is applicable to assess the availability of nutrients in soils.
|
| 关 键 词： | available nutrients conventional chemical extraction ion exchange membrane low pressure system soil nutrient evaluation |
| 收稿时间： | 2012-05-18 |
| 修稿时间： | 2012-09-19 |
A device for simulating soil nutrient extraction and plant uptake |
| |
| YANG Xu-Jian,LAI Yong-Lin,MO Jin-Yu and SHEN Hong. A device for simulating soil nutrient extraction and plant uptake[J]. Pedosphere, 2012, 22(6): 755-763. DOI: 10.1016/S1002-0160(12)60061-7 |
| |
| Authors: | YANG Xu-Jian LAI Yong-Lin MO Jin-Yu SHEN Hong |
| |
| Affiliation: | Laboratory of Root Layer Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642 (China),Laboratory of Root Layer Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642 (China),Laboratory of Root Layer Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642 (China) and Laboratory of Root Layer Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642 (China) |
| |
| Abstract: | In situ evaluating the availability of soil nutrients has been a challenge. In this study, a new type of Device for Simulating Soil Nutrient Extraction and Plant Uptake (DSSNEPU) and its operating procedures were introduced. The device consists of a sampling tube, a fluid supply system, a low pressure system, a tube sheath and an elution cylinder. The sampling tube was firstly soaked in the solution of 0.5 mol L?1 NaHCO3 and then buried into soils. The fluid supply system was connected to the sampling tube and the deionized water was supplied. During the period, low pressure system started a vacuum for 3 min every 10 min interval. After extraction, the sampling tube was removed and the nutrients on the sampling tube were eluted with 0.5 mol L?1 HCl. The elution solution was used for nutrient measurement. The amounts of P and K extracted by DSSNEPU reached the maximal values after 4 h. No significant increases of P and K were observed for longer extraction duration. The optimal temperature for extracting P and K was 30 °C in this experiment. Extracted P and K were increased by 83.3% and 84.6% with the employment of low pressure system in comparison to those without employing low pressure system. Correlation analysis indicated that P and K extracted by DSSNEPU were highly correlated with those by conventional chemical extraction and by plant uptake. The above results suggest that this device is applicable to assess the availability of nutrients in soils. |
| |
| Keywords: | available nutrients conventional chemical extraction ion exchange membrane low pressure system soil nutrient evaluation |
| 本文献已被 CNKI ScienceDirect 等数据库收录！ |
| 点击此处可从《土壤圈》浏览原始摘要信息 |
|
点击此处可从《土壤圈》下载全文 |
|
