A SIMPLE-MODEL FOR OPTIMIZING ROTATIONAL GRAZING

被引：43

作者：

WOODWARD, SJR ^{[1
]}

WAKE, GC ^{[1
]}

PLEASANTS, AB ^{[1
]}

MCCALL, DG ^{[1
]}

机构：

[1] MINIST AGR & FISHERIES,WHATAWHATA RES CTR,HAMILTON,NEW ZEALAND

来源：

AGRICULTURAL SYSTEMS | 1993年 / 41卷 / 02期

关键词：

D O I：

10.1016/0308-521X(93)90037-3

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

A simple mathematical model has been formulated to model a simple rotational grazing system of two fields, where a mob of animals is grazed first in one field, then the other By using linear functions for the rate of herbage mass accumulation and for the rate of animal herbage intake, this system may be solved explicitly to yield expressions for (1) the total intake per animal over the time period, and (2) the total remaining herbage after grazing. Regarding the swap over time as an optimal control variable, these expressions can be optimized. The results are analysed for various initial conditions, including stocking rate, initial biomass in each field, and field area. Comparisons are made with continuous grazing. Extensions to the model are discussed.

引用

页码：123 / 155

页数：33

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