摘要
以通草1号虉草(Phalaris arundinacea‘Tongcao No.1’)为试验材料,采用盐胁迫(300mmol·L-1 NaCl)与不同氮磷钾肥配施处理的沙土盆栽试验方法,分析盐胁迫下氮磷钾肥对虉草K+,Na+,Mg2+,Ca2+和Cl-吸收与分布的影响,并探讨氮磷钾肥水平与离子含量间的相关性。结果表明:随着氮、磷、钾肥水平增加,虉草体内K+,Mg2+和Ca2+含量升高,而Na+和Cl-含量下降,同时K+/Na+,Mg2+/Na+和Ca2+/Na+比值升高。氮磷钾肥施量与虉草Na+含量间成显著负相关,与K+和Mg2+含量间成显著正相关(P<0.05)。在3种肥料中,氮肥对虉草K+,Na+,Mg2+,Ca2+和Cl-含量的影响最明显,钾肥对Mg2+和Cl-含量影响较明显,而磷肥对Ca2+和Mg2+含量影响较明显。
The ion absorption and distribution of reed canarygrass under salt stress（300 mmol · L-1 NaCl）were studied using pot sand culture experiment under a rain shelter for understanding the changes of K＋,Na＋,Mg2＋,Ca2＋ and Cl-contents and the correlations between ion contents and different NPK levels.The results showed that the contents of K＋,Mg2＋and Ca2＋ increased and the contents of Na＋ and Cl decreased in reed canarygrass seedling under salinity stress.The ratios of K＋/Na＋,Mg2＋/Na＋ and Ca2＋ /Na＋ increased with the increase of NPK fertilizer level.The Na＋ content of reed canarygrass was a significant negative correlation with NPK level,whereas the K＋ and Mg2＋ content of reed canarygrass was a significant positive correlation with NPK level （P〈0.05）.Nitrogen fertilizer had the most significant effect on the K＋,Na＋,Mg2＋,Ca2＋ and Cl contents of reed canarygrass compared with others.Potassium fertilizer had more effect on the Cl-and Mg2＋ contents of reed canarygrass,whereas phosphate fertilizer had more effect on the Ca2＋ and Mg2＋ contents of reed canarygrass than others.
出处
《草地学报》
CAS
CSCD
北大核心
2014年第6期1318-1323,共6页
Acta Agrestia Sinica
基金
内蒙古科技厅应用技术研发项目(20120426)
内蒙古民族大学科研创新团队建设计划项目(NMD10-03)
通辽市与内蒙古民族大学科技合作项目(SXYB2012077)资助
关键词
虉草
氮磷钾肥
盐胁迫
离子吸收
Reed canarygrass
NPK fertilizer
Salt stress
Ion absorption
