preg.heifer: Nutrient Requirements for Bred Heifers Calving as 2 Yr Old.

In sgadberry/beefnrc: Functions Based on Nutrient Requirements of Beef Cattle

Description

preg.heifer Nutrient requirements for bred heifers from conception to calving.

Usage

preg.heifer(breed.code = 1, mbw.lbs = 1200, breeding.pct.bw = 60,
  calving.pct.bw = 85)

Arguments

breed.code	Default is 1 = Angus. Breed code must match a code listed in the table 19_1 data file.
mbw.lbs	Default is 1200. This value represents the mature, unshrunk bw (lbs) for cows > 3 yrs old. For first calf heifers, calving at 2 yr is assumed. mbw.lbs is the estimated mature weight for first calf heifers, and equations are based on #' a shrunk bw of 0.85(mbw) at first calving and 0.9(mbw) at second calving.
breeding.pct.bw	Default is 60. This value represents the percentage of mature body weight at heifer breeding.
calving.pct.bw	Default is 85. This value represents the target percentage of mature body weight obtained by first calving. This weight does not reflect the additional weight of the conceptus.

Value

Two tables are printed including nutrient requirement totals and nutrient requirement as a proportion of dry matter intake.

Examples

preg.heifer()
preg.heifer(breed.code=4,breeding.pct.bw=65)

sgadberry/beefnrc documentation built on May 7, 2019, 3:33 p.m.