经济杂交

肉羊胚胎移植和经济杂交技术在海北州养羊业中的应用

Application of Technology of Embryo Transfer and Commercial Crossbreeding of Mutton Sheep in Haibei sheep Husbandry

依靠经济杂交手段可使羊肉生产效益提高40～70%。

Through economic crossing , mutton benefit increased by 40 ~ 70 % .

利用经济杂交提高河北细毛羊出栏羊生产性能的试验研究

Study on Improving The Performance of Marketing Lambs of Hebei fine wool Sheep Via Commercial cross Breeding

肉羊经济杂交羔与纯繁羔在冀西北高寒半干旱区生长对比研究

Contrast between the Crossbred Lambs and the Pure Breeding of Fat-Tail Sheep in the Plateau Region of Northwest Hebei

利用从新西兰引进的优质杜泊绵羊为父本，分别与湖羊和小尾寒羊进行经济杂交试验。

Hu sheep and Han sheep used as female parents were crossbred economically with Dorper sheep imported from New Zealand , respectively .

本文对晋南牛开发实施方案、经济杂交方案及基因库工作方案的内容给予了肯定的评价，并对三个方案提出了意见和建议。

Three protocols including Jinnan cattle development , economic crossbreeding and gene bank construction was evaluated , and recommendations on three protocols was proposed .

本试验的目的在于试图筛选出生长快、体重较大、产肉量较高并适于稻田放牧的四川麻鸭经济杂交组合。

The purpose of this experiment is trying to find out the best economical hybridized combination of partridge sichuan ducks , which would grow faster , have heavier body weight and higher meat production as well as be fit for running in the paddy fields .

索承网壳结构是由单层球面网壳和去掉上层索的张拉整体结构组成的一种跨越能力大、经济合理的新型杂交空间结构。

Cable-supported lattice shell is a new kind of economic and larger spanning hybrid spatial structure system , which is consisted of single-layer spherical lattice shells and tensegrity systems with rid of cables located at the upper layer .