A comparison of models for predicting slurry production on a pig farm

A.G. Williams, W.V. Streader
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引用次数: 1

Abstract

Three methods of predicting slurry production were compared with the volumes actually produced on a 150 sow breeding and fattening pig unit. The methods were based on (a) feed, water and slurry relationships measured in crated and penned pigs; (b) values given in the literature and used by ADAS to predict slurry outputs from pigs; (c) a method based on the digestibility of feed and of water measured at the actual piggery. Method (a) was not found appropriate because of the high overall water:meal ratio found in the unit (13:1). Method (b) was able to predict dry matter production accurately but underestimated the volume produced unless the ADAS allowance of 0·5 litres pig−1 day−1 for washing water and leaking drinkers was increased to 10 litres. Method (c) was the best method for estimating volume but underestimated dry matter production. Combining the better aspects of methods (b) and (c) allows volume, dry matter production and dry matter concentration to be predicted satisfactorily. The daily movements of slurry from the reception pit were very variable. The use of water meters on pig units is recommended to identify wastage.

猪场泥浆产量预测模型的比较
预测浆液产量的三种方法与150头母猪繁殖肥育猪单位实际生产的量进行了比较。这些方法是基于(a)在板条箱和圈养猪中测量的饲料、水和浆液关系;(b)文献中给出的值,ADAS用来预测猪的浆液产量;(c)基于在实际猪场测量的饲料和水的消化率的方法。发现方法(a)不合适,因为在该单元中发现的总体水与粕的比例很高(13:1)。方法(b)能够准确预测干物质产量,但低估了产量,除非将猪- 1天- 1用于洗涤水和泄漏饮水器的0.5升ADAS容许量增加到10升。方法(c)是估计体积的最佳方法,但低估了干物质产量。结合方法(b)和(c)的优点,可以令人满意地预测体积、干物质产量和干物质浓度。每天从接收坑里流出的泥浆变化很大。建议在养猪机组上使用水表来确定浪费。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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