Amelioration of Salt Stress in Sugarcane (Saccharum officinarum L.) by Supplying Potassium and Silicon in Hydroponics

作     者：M.ASHRAF RAHMATULLAH R.AHMAD A.S.BHATTI M.AFZAL A.SARWAR M.A.MAQSOOD S.KANWAL M.ASHRAF 1,2,RAHMATULLAH 2,R.AHMAD 3,A.S.BHATTI 2,M.AFZAL 1,A.SARWAR 4,M.A.MAQSOOD 2 and S.KANWAL 2 1 University College of Agriculture,University of Sargodha,Sargodha (Pakistan) 2 Institute of Soil & Environmental Sciences,University of Agriculture,Faisalabad (Pakistan) 3 Department of Crop Physiology,University of Agriculture,Faisalabad (Pakistan) 4 Sugarcane Research Institute,Ayub Agricultural Research Institute,Faisalabad (Pakistan)

作者机构：University College of AgricultureUniversity of Sargodha Institute of Soil & Environmental SciencesUniversity of Agriculture Department of Crop PhysiologyUniversity of Agriculture Sugarcane Research InstituteAyub Agricultural Research Institute 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2010年第20卷第2期

页      面：153-162页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0818[工学-地质资源与地质工程] 09[农学] 0903[农学-农业资源与环境] 0901[农学-作物学] 

基　　金：Project supported by the Indigenous Ph.D. Scholarship Scheme of the Higher Education Commission of Pakistan 

主　　题：calcium silicate dry matter genotypes potassium nitrate uptake 

摘      要：A hydroponics experiment was conducted to evaluate the role of potassium (K) and silicon (Si) in mitigating the deleterious effects of NaCl on sugarcane genotypes differing in salt *** salt-sensitive (CPF 243 and SPF 213) and two salt-tolerant (HSF 240 and CP 77-400) sugarcane genotypes were grown for six weeks in 1/2 strength Johnson s nutrient *** nutrient solution was salinized by two NaCl levels (0 and 100 mmol L 1 NaCl) and supplied with two levels of K (0 and 3 mmol L 1) and Si (0 and 2 mmol L 1).Applied NaCl enhanced Na + concentration in plant tissues and significantly (P ≤ 0.05) reduced shoot and root dry matter in four sugarcane ***,the magnitude of reduction was much greater in salt-sensitive genotypes than salt-tolerant *** salts interfered with the absorption of K + and Ca 2+ and significantly (P ≤ 0.05) decreased their uptake in sugarcane *** of K and Si either alone or in combination significantly (P ≤ 0.05) inhibited the uptake and transport of Na + from roots to shoots and improved dry matter yields under NaCl *** uptake,K + /Na + ratios,and Ca 2+ and Si uptake were also significantly (P ≤ 0.05) increased by the addition of K and/or Si to the root *** this study,K and Si-enhanced salt tolerance in sugarcane genotypes was ascribed to decreased Na + concentration and increased K + with a resultant improvement in K + /Na + ratio,which is a good indicator to assess plant tolerance to salt ***,further verification of these results is warranted under field conditions.