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- W2566717805 abstract "Three techniques for measuring root growth were evaluated. Two were direct measurements (root lengths in intact soil cores, and root length in cores which had been bored out and refilled with sand or silt) and one was an indirect method using patterns of water extraction. Six cutting treatments which were intended to either, allow different degrees of reproductive growth, or stimulate vegetative growth of a perennial ryegrass (Lolium perenne L.) dominant pasture were imposed from 14 November 1985 (Day 0) until 2 February 1986 (Day 80). Measurement of root lengths under these contrasting sward managements formed the basis of an evaluation of the root sampling techniques. Little or no change in root lengths was measured in intact cores in any of the six cutting treatments over the 80 days of the experiment. In contrast root growth into sand filled cores showed marked treatment differences at Days 56 and 80, and represented up to 47 percent of the root length measured in the upper 300 mm in intact cores at Day 80. Used in conjunction with intact cores, refilled cores give an estimate of root turnover. Patterns of water extraction were not a sensitive indicator of root growth. Using the refilled core technique the rates of root growth measured for reproductive and vegetative ryegrass swards were significantly different. Root growth was reduced during reproductive development but swards in which reproductive growth was removed at head emergence or anthesis, subsequently showed greater root growth than swards which were vegetative throughout." @default.
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- W2566717805 date "1986-01-01" @default.
- W2566717805 modified "2023-09-23" @default.
- W2566717805 title "TECHNIQUES FOR MEASURING THE ROOT GROWTH OF A PERENNIAL RYEGRASS (Lolium perenne L.) DOMINANT PASTURE UNDER CONTRASTING SPRING MANAGEMENTS." @default.
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