内蒙古民族大学学报（自然科学版）2016，Vol.31Issue(2)：125-132,8.DOI:10.14045/j.cnki.15-1220.2016.02.009
施肥对苏打碱土胁迫下虉草生长与Na+、k+含量的影响
Effects of Fertilizing on the Growth and the Ion Content of Phalaris Arundinacea Under Soda Alkali Soil Stress
摘要
Abstract
Abstracts:Effects of different nitrogen and potassium level on the growth and the Na+and K+contents of P. arundinacea Tongcao No.1 under alkali soil stress were studied with pot experiment to provide a theoretical basis for P.arundinacea high yield cultivation in the degraded saline-alkali wetlands. The results showed that nitrogen and potassium promoted the selective absorption of K+and their translocation from roots to shoots of P.arundinacea Tongcao No.1 under alkali soil stress.With the increase of nitrogen and potassium level , K+content and K+/Na+ratio in shoots increased, while Na+content in roots and shoots decreased under alkali soil stress,and the effect of nitrogen was greater than potassium. K+contents of first harvest leav in high nitrogen(N3)treatment increased by 43.64%and K+contents of roots increased by 125.27%compared to no nitrogen (N1). The dry weight of shoots and roots increased with the increase of nitrogen application , The dry weight of first harvest shoots on N3 treatment increased by 47.32%and dry weight of second harvest shoots increased by 146.99% and total dry weight of shoots increased by57.21%compared to N1 treatment.The differences of shoots total dry weight and root dry weight between on N3 treatment were highly significant compared to N1(P<0.05). Effects of potassium on dry weight of shoots and roots were not significant(P>0.05).Effects of nitrogen and potassium combination on growth and contents of Na+content and K+content of P.arundinaceawas significant. N3K3 combination treatment compared with N1K1 ,plant high, tiller number, dry weight of shoots, K+contents and K+/Na+ratio in shoots respectively increased by 51.08%, 83.16%,66.46%,48.9%and 91.0%at first harvest and and K+contents and K+/Na+ratio in roots respectively increased by 141.0%and 217.0%, and . Na+ contents in shoots and roots respectively decreased 24.8%and 26.1%, respectively, difference reached extremely significant level(P<0.05). Showing nitrogen and potassium fertilizer can reduce Na +damage and promote the growth of P. arundinacea under alkali soil stress.关键词
虉草/氮钾肥/盐碱土胁迫/生长/钠钾离子Key words
Phalaris arundinacea/Nitrogen and potassium fertilizer/Alkali soil stress/Growth/Sodium and potassi-um ion分类
农业科技引用本文复制引用
姜澜,张永亮,扈延成..施肥对苏打碱土胁迫下虉草生长与Na+、k+含量的影响[J].内蒙古民族大学学报（自然科学版）,2016,31(2):125-132,8.基金项目
内蒙古科技厅应用技术研发项目（20120426）；通辽市与内蒙古民族大学科技合作项目 （）
