资源类型

期刊论文 2

年份

2023 1

2019 1

关键词

检索范围:

排序: 展示方式:

Phytate and phosphorus utilization by broiler chickens and laying hens fed maize-based diets

Qiugang MA, Markus RODEHUTSCORD, Moritz NOVOTNY, Lan LI, Luqing YANG

《农业科学与工程前沿(英文)》 2019年 第6卷 第4期   页码 380-387 doi: 10.15302/J-FASE-2019276

摘要:

Maize grain is primarily used as an energy source for poultry and other animals. Maize has relatively high phytate-P content and very low intrinsic phytase activity. Given that feed phosphates are produced from finite rock phosphate resources, a reduction in the use of feed phosphates in maize-based diets by increasing the utilization of plant P sources by animals is necessary to make poultry meat and egg production more sustainable. The utilization of P by poultry is affected by two intrinsic characteristics of maize: the concentration of inositol phosphates and the activity of the intrinsic phytase of the grain in the digestive tract. The objective of this review is to present data on the variation that exists in composition of maize relevant for P use and to address factors that influence P utilization in maize-based diets of poultry. Broiler chickens and laying hens have the potential to degrade phytate in the gastrointestinal tract, but this is depressed by high dietary Ca and P concentrations. Published values of phytate degradation in broilers are overall higher than those in laying hens. Differences also exist between broiler chickens and growing turkeys and Pekin ducks. The exogenous supplementation of microbial phytases and the introduction of transgenic high phytase maize in poultry diets are efficient not only for the improvement of phytate-P digestibility, production performance, egg quality and bone mineralization, but also for the reduction of P excreta to control environmental impact.

关键词: broiler     ducks     high phytase maize     laying hens     low phytate maize     phytase     turkeys    

DEVELOPMENT OF AN AUTOMATIC WEIGHING PLATFORM FOR MONITORING BODYWEIGHT OF BROILER CHICKENS IN COMMERCIAL

《农业科学与工程前沿(英文)》 2023年 第10卷 第3期   页码 363-373 doi: 10.15302/J-FASE-2023510

摘要:

● An automatic weighing system for monitoring bodyweight of broilers was developed.

关键词: automatic weighing     weight monitoring     floor housing     uniformity     precision poultry farming    

标题 作者 时间 类型 操作

Phytate and phosphorus utilization by broiler chickens and laying hens fed maize-based diets

Qiugang MA, Markus RODEHUTSCORD, Moritz NOVOTNY, Lan LI, Luqing YANG

期刊论文

DEVELOPMENT OF AN AUTOMATIC WEIGHING PLATFORM FOR MONITORING BODYWEIGHT OF BROILER CHICKENS IN COMMERCIAL

期刊论文