Effects of spring fertilizer nitrogen and sward height on production from perennial ryegrass white clover swards grazed by beef cattle

被引：0

作者：

Johnson, RH ^{[1
]}

Morrison, J ^{[1
]}

机构：

[1] Inst Grassland & Environm Res, N Wyke Res Stn, Okehampton EX20 2SB, Devon, England

来源：

GRASS AND FORAGE SCIENCE | 1997年 / 52卷 / 03期

关键词：

D O I：

10.1046/j.1365-2494.1997.00081.x

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

An experiment was carried out to compare the effects of two compressed sward height treatments, each at two fertilizer nitrogen (N) treatments (0 and 50 kg ha(-1) in spring), on the date of turnout and Liveweight gain of steers grazing a perennial ryegrass/white clover (Lolium perenne/Trifolium repens) sward sited on clay loam in south-west England. The sward height treatments were 6 cm all season, and 4 cm in the spring rising to 6 cm in June; these were maintained using continuously variable stocking with Hereford X Friesian steers. Cattle were turned out on average 11.5 days earlier on the 4-cm sward height compared with the 6-cm sward height treatment. Liveweight gain early in the season was lower on the 4-cm swards than on the 6-cm swards. Liveweight gain ha(-1) over the whole season was similar for the two sward height treatments. Fertilizer N did not affect turnout date or liveweight gain.

引用

页码：322 / 324

页数：3

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