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

来源：

WEED SCIENCE | 2008年 / 56卷 / 04期

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

页码：529 / 533

页数：5