THE USE OF LIGHT INTERCEPTION, GROSS MORPHOLOGY AND TIME AS CRITERIA FOR THE HARVESTING OF TIMOTHY, SMOOTH BROME AND COCKSFOOT
1966; Wiley; Volume: 21; Issue: 3 Linguagem: Inglês
10.1111/j.1365-2494.1966.tb00478.x
ISSN1365-2494
Autores Tópico(s)Rangeland and Wildlife Management
ResumoAn experiment was designed to compare morphological development, light interception and time interval as possible criteria for the defoliation of timothy, brome‐grass and cocksfoot. The morphological criterion included: (a) a first harvest before stem elongation and a second harvest after initiation of axillary bud development at the base of each tiller (b) a harvest immediately after stem elongation. Light was compared on the basis of 95 % and 80 % interception of the incident radiation by the foliage. Two‐, 4‐ and 6‐week intervals were used in the time series. Increased yields of up to 2600 lb DM/ac were obtained in timothy and bromegrass fertilized at 275 lb N/ac/yr when morphological treatment (a) was used in preference to (b); cocksfoot yields were not influenced. The greater the time interval between harvests or the greater the light interception before harvest, the greater was the yield. Advantages and disadvantages of the 3 criteria are discussed.
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