摘要
以水茄(Solanum torvum Sw.)幼苗为材料,用溶液培养法诱导N、P、K缺素症,观察缺素症的形态特征并测定各缺素水茄的生长与生理差异,以期为水茄栽培的营养诊断和施肥提供理论依据。结果表明:水茄缺素症的表现时间和主要症状有差异,缺N症状表现最早,缺N、缺K处理对植株地上部影响最明显;水茄缺素处理的叶片数、全株干质量、根总体积均低于对照,根冠比均高于对照;缺N水茄老叶和嫩叶的叶绿素含量均极显著低于对照,缺P处理的嫩叶叶绿素含量则极显著高于对照;不同缺素处理水茄的根系活力之间差异极显著,缺N和缺P植株根系活力变弱,而缺K植株的根系活力变强,比对照极显著提高了44.34%。
Deficiency symptoms of nitrogen,phosphorus and potassium in Solanum torvum seedlingscultured in nutrient solution were induced and observed,along with the determination of growth parameters andphysiological characteristics. Results indicated that each specific nutrient deficiency induced exclusive symptoms.The emergence time and severity of 3 different nutrient deficiencies were different. The symptom of nitrogendeficiency emerged the earliest. The nitrogen and potassium deficiency had the most obvious effect on abovegroundplant parts. The number of leaves,whole-plant dry weight and root total volume under nutrient deficiencytreatments were all lower than those of the contrast,whereas the root to shoot ratio was higher than that of thecontrast. The chlorophyll contents in both old and tender leaves were significant lower than that of the contrastunder N deficiency treatment,but the chlorophyll content of tender leaves was significantly higher than that of thecontrast under P deficiency treatment. There were extreme obvious differences in the root system activities. N andP deficiency weakened the activity of plant root system. While K deficiency significantly increased root activity by44.34% as compared with the contrast.
作者
许良政
曾宪录
何桂玲
刘惠娜
刘德良
朱宏官
XU Liang-zheng;ZENG Xian-lu;HE Gui-ling;LIU Hui-na;LIU De-liang;ZHU Hong-guan(School of Life Sciences,Jiaying College,Meizhou 514015,Guangdong,China)
出处
《中国蔬菜》
北大核心
2018年第12期45-49,共5页
China Vegetables
基金
中央财政支持地方高校发展专项(财教[2015]196号)
广东省科技计划项目(2012A020602067)
广东省本科高校高等教育综合类改革项目(粤教高函[2016]236号)
广东省本科高校教学改革与教学质量工程建设项目(粤教高函[2015]133号)
关键词
水茄
缺素症
氮
磷
钾
Solanum torvum
Nutrient deficiency symptom
Nitrogen
Phosphorous
Potassium
作者简介
许良政,男,教授,主要从事植物营养生理及驯化生理学研究,E-mail：xuliangzhengjyu@126.com
