英国萨能羊、纽宾羊和雅安奶山羊生理指标的测定及比较

本试验对43只英国萨能羊、27只纽宾羊和23只雅安奶山羊的八项生理指标进行了测定和比较。结果表明,英国萨能羊和纽宾羊的各项生理指标同雅安奶山羊基本相似,完全符合山羊生理指标的一般规律。     

浅丘区森林立地类型划分研究

在大样本调查基础上，选择优势树高、海拔、土壤总厚度、土体石砾含量、土壤A1层厚度等立地特征作为分类指标，运用多元统计分析，探讨浅丘区森林立地分类的方法。     

The influence of various types and frequencies of rest on the production and condition of sourveld grazed by sheep or cattle. 2. Vigour

Treatments involving a full growing season rest in alternate years, half a growing season rest (late season) in alternate years and no rest were applied to veld grazed by sheep or cattle at similar stocking rates. Residual effects of the treatments on veld vigour were determined by measuring species regrowth during the season following treatment application, compared to ungrazed controls. The vigour of veld grazed by sheep declined rapidly relative to veld grazed by cattle. The vigour of palatable species was severely impacted, vigour of intermediate species was variably impacted and vigour of unpalatable species increased dramatically on veld grazed by sheep. Similar trends occurred in veld grazed by cattle, but to a lesser degree. Resting was beneficial for vigour recovery in both sheep and cattle treatments but it seems that the grazing treatment between rests has an over-riding influence on veld vigour. The veld grazed by sheep remained at a lower productivity level than veld grazed by cattle. Principles related to resting and the impacts of sheep and cattle grazing are briefly discussed with a view to formulating management strategies.     

水稻野败雄性不育恢复基因在岷江、涪江流域地方品种中的分布初探

对岷江和涪江流域的279份水稻地方品种与野败珍汕97A测交F1鉴定，结果表明：在两江流域的水稻地方品种中存在着对野败雄性不育育性恢复程度不同的品种，可供育种和生物技术开发利用。     

遗传与环境的互作对蛋鸡异常蛋产生的影响

本文研究了蛋鸡产蛋期的异常蛋（双黄蛋、软完蛋、破裂蛋）现象。试验用三个品种进行三种不同处理（光照、饲养、舍温），分析了遗传和环境因素对异常蛋产生的影响及其互作效应．结果表明，异常蛋的产生在产蛋期不同阶段有较大差异。不同品种鸡异常蛋出现率有显著差异（P＜0．05），采用不同光照对异常蛋的产生有显著影响，而饲养制度和舍温则无明显影响。遗传与环境的互作效应在品种X光照、品种X饲养X会温之间有一定显著性。     

小麦新品种川农16农艺性状分析

以四川农业大学小麦研究所创制的新材料 87- 4 2 9与中国科学院成都生物所选育的川育 12为亲本 ,采用杂交育种方法育成的小麦新品种川农 16 ,在四川省区域试验、生产试验和国家区域试验中分别平均增产 14 2 %、14 0 %和 12 7%。结果分析表明 ,川农 16的丰产性、稳产性、穗容量和成穗率均属四川小麦育种的新突破 ,具有重大推广应用价值     

两种葡萄霜霉病抗性鉴定标准的分析比较

本研究比较了葡萄霜霉病抗性鉴定中反应型与严重度两种鉴定标准。结果表明,两种抗性鉴定标准呈极显著相关,均可以反映葡萄植株对霜霉病的抗病性。反应型标准简便、准确、稳定,是定性的分级方法,而严重度标准可以反映植株抗病性的微小差异。