Effect of Soil Water Suction on the Germination and Emergence of Warm Season Grasses

DOI JASI Web Site

Bibliographic Information

Other Title
  • 暖地型牧草類種子の発芽ならびに出芽に及ぼす土壌水分の影響
  • ダンチガタ ボクソウルイ シュシ ノ ハツガ ナラビニ シュツガ ニ オヨボス

Search this article

Abstract

1. In this study, the interrelation between soil water suction and germination and the emergence above the soil surface after germination was investigated at 30℃ constant temperature using representative warm season grasses with the alike object as has already been reported on the previous paper. Water suction-water content curve of the mineral soil tested was as show in fig.1. 2. The percentage of germination and emergence of all species did not vary at the lower levels of soil water suction and decreased rapidly at the some levels above the limit of water suction (fig.2). But the degree of such decline varied by the species and Sorghum spp. and Millet spp. well-emerged evidentlly in the higher levels of soil water suction. Among the small seed species, Panicum spp. and Rhodes grass were much more severly affected at increased soil water suction and decreased rapidly at some levels over the limit of water suction. 3. Soil water suction permitting the relative germination and emergence percentages of 0% and 50% (percentage at 0.03atm.=100) and also that over which emergence percentage began to lower rapidly were shown as in table 1. 4. The rate of emergence of almost species declined slowly with the increase of soil water suction at the lower levels in which the percentage of emergence did not declined, and decreased rapidly at the some levels above the limit of water suction. But there were no differences among the species in the degree of such reduction (fig.3).

Journal

Details 詳細情報について

Report a problem

Back to top