Abstract
An allelopathic interaction of a pasture-forest intercropping system was evaluated by experiments conducted in field and by laboratory assays. A study site was situated in the farm of Hoshe Forestry Experiment Station at Nantou County, Taiwan. After deforestation of Chinese fir (Cunninghamia lanceolata), a split plot design of 4 treatments, namely litter removed, litter removed and kikuyu grass (Pennisetum clandestinum) planted, litter left, and litter left and grass planted, was composed. Field meaurements showed that the fir litter left on the ground did not significantly inhibit the growth of weeds, kikuyu grass, and fir seedlings in the first four months following deforestation, while kikuyu grass significantly suppressed the growth of weeds longer than four months but did not reduce growth of fir seedlings. The aqueous extracts of fresh fir leaves, fir litter, and kikuyu leaves were bioassayed by using lettuce and rice seeds and stolon cuttings of Brachiaria mutica. Bioassays showed that fresh fir leaves produced significant phytotoxicity while fir litter and kikuyu grass gave limited toxicity. Nine phytotoxic phenolics and many unidentified flavonoids were found in the leaf and litter of Chinese fir and kikuyu leaves. A good correlation between the degree of phytotoxicity and phytotoxins was obtained, indicating an allelopathy was involved. This finding suggests that allelopathy may contribute benefits in the intercropping system to reduce the need for herbicides and to lessen the labor cost for weed control.
| Original language | English |
|---|---|
| Pages (from-to) | 31-41 |
| Number of pages | 11 |
| Journal | Plant and Soil |
| Volume | 98 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1987 Feb 1 |
Fingerprint
Keywords
- Allelopathy
- Chinese fir
- Cunninghamia lanceolata
- Kikuyu grass
- Pasture-forest intercropping
- Pennisetum clandestinum
- Phenolics
- Phytotoxin
ASJC Scopus subject areas
- Soil Science
- Plant Science
Cite this
The selective allelopathic interaction of a pasture-forest intercropping in Taiwan. / Chou, Chang Hung; Hwang, Shih-Ying; Peng, Ching I.; Wang, Yeong Chyn; Hsu, Fu Hsing; Chung, Nien June.
In: Plant and Soil, Vol. 98, No. 1, 01.02.1987, p. 31-41.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The selective allelopathic interaction of a pasture-forest intercropping in Taiwan
AU - Chou, Chang Hung
AU - Hwang, Shih-Ying
AU - Peng, Ching I.
AU - Wang, Yeong Chyn
AU - Hsu, Fu Hsing
AU - Chung, Nien June
PY - 1987/2/1
Y1 - 1987/2/1
N2 - An allelopathic interaction of a pasture-forest intercropping system was evaluated by experiments conducted in field and by laboratory assays. A study site was situated in the farm of Hoshe Forestry Experiment Station at Nantou County, Taiwan. After deforestation of Chinese fir (Cunninghamia lanceolata), a split plot design of 4 treatments, namely litter removed, litter removed and kikuyu grass (Pennisetum clandestinum) planted, litter left, and litter left and grass planted, was composed. Field meaurements showed that the fir litter left on the ground did not significantly inhibit the growth of weeds, kikuyu grass, and fir seedlings in the first four months following deforestation, while kikuyu grass significantly suppressed the growth of weeds longer than four months but did not reduce growth of fir seedlings. The aqueous extracts of fresh fir leaves, fir litter, and kikuyu leaves were bioassayed by using lettuce and rice seeds and stolon cuttings of Brachiaria mutica. Bioassays showed that fresh fir leaves produced significant phytotoxicity while fir litter and kikuyu grass gave limited toxicity. Nine phytotoxic phenolics and many unidentified flavonoids were found in the leaf and litter of Chinese fir and kikuyu leaves. A good correlation between the degree of phytotoxicity and phytotoxins was obtained, indicating an allelopathy was involved. This finding suggests that allelopathy may contribute benefits in the intercropping system to reduce the need for herbicides and to lessen the labor cost for weed control.
AB - An allelopathic interaction of a pasture-forest intercropping system was evaluated by experiments conducted in field and by laboratory assays. A study site was situated in the farm of Hoshe Forestry Experiment Station at Nantou County, Taiwan. After deforestation of Chinese fir (Cunninghamia lanceolata), a split plot design of 4 treatments, namely litter removed, litter removed and kikuyu grass (Pennisetum clandestinum) planted, litter left, and litter left and grass planted, was composed. Field meaurements showed that the fir litter left on the ground did not significantly inhibit the growth of weeds, kikuyu grass, and fir seedlings in the first four months following deforestation, while kikuyu grass significantly suppressed the growth of weeds longer than four months but did not reduce growth of fir seedlings. The aqueous extracts of fresh fir leaves, fir litter, and kikuyu leaves were bioassayed by using lettuce and rice seeds and stolon cuttings of Brachiaria mutica. Bioassays showed that fresh fir leaves produced significant phytotoxicity while fir litter and kikuyu grass gave limited toxicity. Nine phytotoxic phenolics and many unidentified flavonoids were found in the leaf and litter of Chinese fir and kikuyu leaves. A good correlation between the degree of phytotoxicity and phytotoxins was obtained, indicating an allelopathy was involved. This finding suggests that allelopathy may contribute benefits in the intercropping system to reduce the need for herbicides and to lessen the labor cost for weed control.
KW - Allelopathy
KW - Chinese fir
KW - Cunninghamia lanceolata
KW - Kikuyu grass
KW - Pasture-forest intercropping
KW - Pennisetum clandestinum
KW - Phenolics
KW - Phytotoxin
UR - http://www.scopus.com/inward/record.url?scp=0003069215&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0003069215&partnerID=8YFLogxK
U2 - 10.1007/BF02381725
DO - 10.1007/BF02381725
M3 - Article
AN - SCOPUS:0003069215
VL - 98
SP - 31
EP - 41
JO - Plant and Soil
JF - Plant and Soil
SN - 0032-079X
IS - 1
ER -