Tillage Effects on Soil Temperature, Shoot Dry Matter Accumulation and Corn Grain Yield
| Autor: | J.L.B. Culley, H. N. Hayhoe, B. L. Ma, Lianne M. Dwyer |
|---|---|
| Rok vydání: | 1995 |
| Předmět: | |
| Zdroj: | Journal of Sustainable Agriculture. 5:85-99 |
| ISSN: | 1540-7578 1044-0046 |
| DOI: | 10.1300/j064v05n01_07 |
| Popis: | Shoot dry matter data from a multi-year experiment with four tillage treatments (conventional (MB), chisel (CH), ridge till (R) and no-till (NT)) conducted on two sites at Ottawa, Canada (45°23'N, 75°43'W) were analyzed to determine to what extent tillage differences influenced shoot growth over the vegetative period. Over three years the ranking of corn shoot dry matter at 6-leaf, 12-leaf and silking stages was MB > CH > R > NT. Tillage effects were only statistically significant (P ≦ 0.05) at early vegetative stages. Phenological data indicated a greater delay in silking than in reaching the 6-leaf stage under conservation tillage. Thermal units (growing degree days, base temperature 10°C) in the seed bed (0.05 m) were also ranked MB > CH > R > NT for development between planting and the 6-leaf stage. By the 12-leaf and silking stages, tillage treatment had little effect on soil temperature. Soil temperatures at the 0.20 m depth were unaffected by tillage treatment. Shoot growth gradually became a funct... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|