滩涂互花米草生长盐分区间及其化感作用  

Salinity Interval and Its Allelopathy of Spartina alterniflora in Tidal Flats

作　　者：成海[1] 陈浩[1] 刘月 陈亚芹[1] 张亚楠 李洪山[2] CHENG Hai;CHEN Hao;LIU Yue(Jiangsu Yancheng National Rare Birds Nature Reserve Management Office,Yancheng,Jiangsu 224057;Yancheng Institute of Technology,Yancheng,Jiangsu 224051)

机构地区：[1]江苏盐城国家级珍禽自然保护区管理处,江苏盐城224057 [2]盐城工学院,江苏盐城224051

出　　处：《安徽农业科学》2022年第14期67-69,共3页Journal of Anhui Agricultural Sciences

基　　金：2020年江苏省林业科技创新与推广项目“沿海滩涂湿地互花米草控制及碱蓬群落原位恢复技术集成示范”(LYKJ〔2020〕07)。

摘　　要：以互花米草为试验材料,比较其在不同盐质量分数下水培(0~2.9%)和土培(0~2.0%)的出苗及生长情况,并采用不同固液比的互花米草烘干根茎浸提液浓缩液(0、0.02、0.04 g/mL)测定对小麦、盐地碱蓬种子发芽率的影响及化感作用。结果表明,无论在水培还是土培环境下,互花米草对不同盐质量分数处理呈现出不同的适应性,盐质量分数高对互花米草出苗具有抑制作用。在盐质量分数为0~2.5%下水培和盐质量分数为0~1.1%下土培,互花米草均有可出苗,可知互花米草水培、土培生长盐分区间分别为0~2.5%、0~1.1%。化感作用中,随互花米草浸提液浓度增加,7 d时小麦种子的发芽率下降、盐地碱蓬种子的发芽率上升,可知互花米草根茎浸提液对小麦种子的发芽具有抑制作用,但对盐地碱蓬种子的作用相反。Using Spartina alterniflora as the test material,the seedling emergence and growth of Spartina alterniflora were compared under different salt content hydroponics(0-2.9%)and soil culture(0-2.0%).The effects and allelopathy of different solid-liquid ratios of S.alterniflora root and stem extracts(0,0.02,0.04 g/mL)on the germination rate of wheat and Suaeda salsa seeds were determined.The results showed that S.alterniflora showed different adaptability to different salt mass fractions in both hydroponics and soil culture,and high salt mass fractions had an inhibitory effect on the emergence of S.alterniflora.The seedlings of S.alterniflora could both emerge when the salt mass fractions was 0-2.5%in hydroponics and 0-1.1%in soil culture.The salinity range of S.alterniflora hydroponics and soil culture was 0-2.5%and 0-1.1%,respectively.In allelopathy,with the increase of S.alterniflora extract concentration,the germination rate of wheat seeds decreased and the germination rate of Suaeda salsa seeds increased at 7 d,indicating that S.alterniflora root and stem extract had inhibitory effect on the germination of wheat seeds,but the opposite effect on Suaeda salsa seeds.

关 键 词：互花米草 生长区间 盐分 化感作用 

分 类 号：Q948[生物学—植物学]