Finger-Harrowing of Durum Wheat under Different Tillage Systems
作者:
Paolo Bàrberi,
Nicola Silvestri,
Andrea Peruzzi,
Michele Raffaelli,
期刊:
Biological Agriculture & Horticulture
(Taylor Available online 2000)
卷期:
Volume 17,
issue 4
页码: 285-303
ISSN:0144-8765
年代: 2000
DOI:10.1080/01448765.2000.9754850
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The effect of finger-harrowing (FH) on weed control and yield of durum wheat (Triticum durumDesf) grown under conventional tillage (CT) or no-tillage (NT) was studied in 1995–96. Mechanical weeding—eight combinations between four tine adjustments and two treatment intensities (one or two passes)—was compared with post-emergence herbicide spraying and an unweeded control. Tine working depth was higher in CT than in NT due to lower soil dry bulk density, and increased with the theoretical aggressiveness of tine adjustments, but its correlation with short- and long-term effects on crop and weeds overall was poor, suggesting that tine adjustment was not a major factor involved. In 1995, durum wheat grain yield in FH was very low, because of high weed development in both tillage systems. In 1996, lower weed pressure resulted in FH grain yield, on average 3982 kg ha−1for CT and 2809 kg ha−1for NT, comparable with that obtained with herbicides. Durum wheat grain yield and weed biomass were much more affected by tillage system than by tine adjustment or harrowing intensity, and seemed mostly dependent on the lower crop competitive ability in NT, caused by reduced emergence, higher weed abundance and presence of aggressive weed species,Ammi majusin 1995 andLolium multiflorumin 1996. Dependence of FH effect upon soil and weed conditions encountered seasonally in the two tillage systems suggests that, in low-input durum wheat, mechanical methods alone would not always guarantee adequate weed control and grain yield.
点击下载:
PDF (1650KB)
返 回