复壮

The external cause includes unfitting culture conditions, strain aging, unsuitable preservation and infection virus of asexuality propagation.

针对遗传变异和环境条件引起的菌种性能衰退，提出了有效的预防措施及具有可操作性的菌种复壮技术。

Group Ⅲ was vaccinated with 1ml bacterin at 1 week postchallenge and the left group unvaccinated as control.

各组均在29周龄时用通过SPF鸡两次复壮的MG-BG44T株经左胸气囊和鼻腔攻毒。

Keeping and cultivating coppice shoot of broad-leaf trees with economic benefit and rejuvenating secondary trees or planting broad-leaf trees in slashing are effective ways to develop and cultivate broad-leaf forest resources.

在采伐迹地上留育有经济价值的阔叶树萌芽条、阔叶树残次林的复壮和人工栽植阔叶树，是发展、培育阔叶林资源的有效途径。

These markers have had a revolutionary impact on the study of genetic structure and variation of pearl oyster, With genetic markers, they have allowed rapid progress in better strains selection and effective protection.

运用各种遗传标记对海洋珍珠贝的遗传结构及多样性进行研究，有利于提出有效的保护和复壮方案，加速良种的选育。

We extracted membrane protein of Mycoplasma hyopneumoniae MY-99 strain from its different passages strains MY-99l,MY-993 and rejuvenescence strain MY-992, then analyzed them by SDS-PAGE, the results show that the membrane protein of Mycoplasma hyopneumoniae MY-99 strain mutated during artificial culturing . According to the electrophoretic profiles, the membrane proteins of MY-991 include 7 protein bands: 94.4KD,57.5KD,46.0KD,36.0KD,32.4KD,20.4KD and 16.6KD.

采用0.4％TritonX-100结合KI提取猪肿炎支原体MY-99株不同代次的传代株MY-991、MY-993和复壮株MY-992的膜蛋白，并通过SDS-PAGE技术对其膜蛋白进行比较分析发现，在人工培养条件下猪肺炎支原体MY-99株的膜蛋白发生了一定的变异，其中MY-991株的膜蛋白有七条蛋白条带：94.4KD、57.5KD、46.0KD、36.0KD、32.4KD、20.4KD和16.6KD，MY-993株的膜蛋白有七条蛋白条带：94.4KD、57.5KD、46.0KD、41.0KD、36.0KD、32.4KD和19.5KD，MY-992株的膜蛋白只有两条蛋白条带：46.0KD和32.4KD。

Objective: To study the rejuvenation of Armillaria mellea strain.

中文摘要：目的：研究蜜环菌菌种的复壮问题。

Prolonged starvation and aging might lead to rejuvenation of embryogenic potential.

长期的饥饿和衰老可以导致胚胎发生能力的复壮。

After multigeneration, Scleroderma sichuanensis Xiao's forestal search and parasitize capability decreased, the defense effect to the hole-worm such as Semanotus bifasciatus and Clytus validus Fairmaire degraded, lead to the prevention cost increase .

本试验主要是从川硬皮肿腿蜂的退化状况、野外川蜂和实验室川蜂在形态上和遗传上的区别等方面来安排实验，通过用川硬皮肿腿蜂的原生寄主——双条杉天牛来达到复壮的目的。

Those parent abalones of wild or artificial selection with good economic characters must be chosen in order to avoid close breeding.. Correct breeding techniques must be adopted to obtain excellent germ cells and larvae. The survival rate and disease resistance of juvenile abalone can be remarkably increasedonce the further selecting and culturing are carried out. The rejuvenation is realized once a good breeding condition for the young and parent abalones is created, the adverse culturing condition and technical maloperation are reduced or eliminated. The survival rate of the breeding and young abalonesincrease about 28.9%-31.2%, the survival rate of the grown abalones is high up to 85%-90%.

通过挑选经济性状好的台湾九孔鲍和人工选育的九孔鲍亲体进行繁殖，避免近亲繁殖，选优除劣，达到正本清源的目的；采用正确的繁殖技术，获得优良的受精卵和幼虫，通过对幼虫进一步选优和培育，使附板后的幼鲍成活率及抗病力得到明显提高；为九孔鲍的苗种和亲本培育创造良好的养殖生态条件，减少和消除了不利的养殖环境和操作技术，达到品种复壮的目的；阐述了野生鲍、复壮鲍、退化鲍三个不同类群的免疫机能具有显著的差异，复壮后的九孔鲍，其免疫机能基本达到了野生鲍的水平；人工育苗和幼鲍的成活率提高了28.9%-31.2%；成鲍的养殖成活率高达85%-90%以上。

Those parent abalones of wild or artificial selection with good economic characters must be chosen in order to avoid close breeding.. correct breeding techniques must be adopted to obtain excellent germ cells and larvae. the survival rate and disease resistance of juvenile abalone can be remarkably increased once the further selecting and culturing are carried out. the rejuvenation is realized once a good breeding condition for the young and parent abalones is created, the adverse culturing condition and technical maloperation are reduced or eliminated. the survival rate of the breeding and young abalones increase about 28.9%-31.2%, the survival rate of the grown abalones is high up to 85%-90%.

通过挑选经济性状好的台湾九孔鲍和人工选育的九孔鲍亲体进行繁殖，避免近亲繁殖，选优除劣，达到正本清源的目的；采用正确的繁殖技术，获得优良的受精卵和幼虫，通过对幼虫进一步选优和培育，使附板后的幼鲍成活率及抗病力得到明显提高；为九孔鲍的苗种和亲本培育创造良好的养殖生态条件，减少和消除了不利的养殖环境和操作技术，达到品种复壮的目的；阐述了野生鲍、复壮鲍、退化鲍三个不同类群的免疫机能具有显著的差异，复壮后的九孔鲍，其免疫机能基本达到了野生鲍的水平；人工育苗和幼鲍的成活率提高了28.9%-31.2%；成鲍的养殖成活率高达85%-90%以上。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。