A Study on Root Extension of Herbage Plants as Influenced by Soil Moisture
その他（別言語等）
のタイトル
牧草の根系発達に及ぼす土壌水分の影響 著者（英） Chae Je Cheon, Fukunaga Kazuo, Maruyama
Junkoh, Hongo Akio journal or
publication title
Research bulletin of Obihiro Zootechnical University. Series I
volume 11
number 2
page range 253‑262
year 1979‑05‑18
URL http://id.nii.ac.jp/1588/00002245/
Res. Bull. Obihiro Univ.， 11 (1979): 253...，262
A S t u d y o n R o o t E x t e n s i o n o f H e r b a g e P l a n t s a s I n f l u e n c e d by S o i l M o i s t u r e
Je Cheon CHAE
(Department o[ Cro.ρScience， College o[ Agriculture Seoul National University
，
Su Weon，
KyungGi‑Do 170，
Korea)Kazuo FUKUNAGA， Junkoh MARUYAMA and Akio HONGO
(Deρartment o[ Grassland Ecology
，
Obihiro University o[ Agriculture and Veterinary Medicine，
Obihiro，
Hokkaido，
Japan)Received November 3，日1978
牧草の根系発達に及ぼす土壌水分の影響 茶 済 天 ネ ・ 福 永 和 男 料 ・ 丸 山 純 孝 料 ・ 木 江 昭 夫 判
Introduction
253
Since plant roots are the principal organ by which nutrients are absorbed and stored，
an understanding of root behavior is essential for the establishment
，
maintenance and persistency of grassland. But， unfortunately， there is litt1e information about root behavior not only in each of the grasses and legumes but also in mixed swards because of the many di伍
cultiesencountered in the study of rootsOf course， a number of earlier studies on the underground p町tof herbage plants have reported that they are affected by various factors. Those works were
，
for the most part，
on the influences of cutting height and frequences4， ; ， :
7，
13，
19，
30)，
seasonal changes1，
7， の ，
top‑root relationshipsl， I l ，
23， >
and the development of the root system18，
2D. However，
most of these observations about root dimensions were based mainly on root weight or root number，
and were investigated immediately after cutting or very soon thereafterBut there has been reported little information on the importance of early growthG
，
8，
14
，
22，
2";
， >
during the period from germination to the time of the first cutting，
from a compe‑titional point of view， where keen competition for nutrients and soil space was expected to occur. Moreover， no information is available on root behavior as measured by root length which seems to be more closely related to the root function of nutrient absorption
勢 ソウノレ大学校~科大学民学科
持帯広畜産大学草地生態学研究室
21
