Influence of environmental factors on seed germination and seedling emergence of American sloughgrass (Beckmannia syzigachne)

被引:84
|
作者
Rao, Na [1 ]
Dong, Liyao [1 ]
Li, Jun [1 ]
Zhang, Hongjun [2 ]
机构
[1] Nanjing Agr Univ, Coll Plant Protect, Minist Agr, Key Lab Monitoring & Management Plant Dis & Insec, Nanjing 210095, Peoples R China
[2] Inst Control Agrochem, Minist Agr, Beijing 100026, Peoples R China
关键词
temperature; light; pH; osmotic potential; salt stress; burial depth;
D O I
10.1614/WS-07-158.1
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
The influence of environmental factors on seed germination and seedling emergence of American sloughgrass was studied in laboratory and greenhouse conditions. The optimum temperature for seed germination was 10 C and light was not necessary. Seed germination was sensitive to osmotic potential and completely inhibited at an osmotic potential of -0.6 MPa, but it was quite tolerant to salinity: germination occurred even at 160 mM NaCl (36%). More than 80% of seeds germinated at pH values ranging between 4 and 10. Seedling emergence was highest when seeds were placed on the soil surface (91%) but declined with burial depth. Few (3%) seedlings emerged when seeds were planted at a depth of 5 cm. Information gained in this study will lead to a better understanding of the requirements for American sloughgrass germination and emergence.
引用
收藏
页码:529 / 533
页数:5
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