桑枝灵芝的高产栽培研究

通过试验，筛选出较适宜桑枝栽培的灵芝菌株和培养料配方各1个，并进行了桑枝灵芝高产栽培模式的探索。试验结果表明采用新鲜桑枝屑和仿野生栽培可使灵芝产量获得大幅提高，是桑枝栽培灵芝取得高产的极为有效的措施。     

The Studies on the Grunting of Sows during Nursing and the Sucking Behaviour of Piglets

Two experiments were carried out to study the grunting of sows during nursing and the sucking be-haviour of piglets. In experimental I,six Yorkshire sows and their litters were observed and managed in farrowing crates.In experimental Ⅱ,six Harbin White sows and their litters were selected and housed in farrowing pens.The behaviours and activities of the sows during nursing and the actities of piglest during sucking were recorded with a portable video camera (PanasonicNV-VX22EN)The results showed that the characteristic patterns of grunting by the sows consist of an initial period of rhythmic grunting at a fairly constant rate and followesd by a period of more rapid grunting,and then a decline in grunting rate toward the completion of nursing.The pattern of vocalization showed by the mothers bears a reliable synchronization to the sucking behaviour of the piglets.The rate of grunting varied little during jostling for teat and nosing the udder.The beginning of slow sucking usually occurred during of just after the increase in grunt rate.The rapid sucking began 15-25seconds after the period of most rapid grunting,fol-lowingthe decrease of grunt rate.afterwards the nursing ended.There were individualities found in sows‘grunting patterns.It is found that vocalizations attracted the piglets to the sows and synchronized sucking activities of piglets,but the results indicated that the premassaging time and numbers of piglets enagaing massaging influ-enced the grunting pattern and the onset of the milk ejection.As more piglets were involved the massaging,the higher the grunting rate peak,the faster the milk ejection.     

闽南粮食三熟超高产栽培研究初报

1997－1999年在福建省龙海市研究粮食超高产栽培，明确：① 粮食一年 三熟超高产的最佳作物组合是稻－稻－马铃薯，平均产量达27050±190.5kg/hm^2；②超高产水稻的形态生理特征是穗多穗大，具有巨大 库容量；根系形态发达，活力高而持久； NPK养分积累优势在前期和中期，干物质和贮藏性 碳水化合物（SC）的 积累优质在中期和后期。根据研究结果，提出粮食三熟超高产栽培技术的构想，拟于今后验证完善。     

木材成分综合利用的经济效益分析

对木材成分综合利用系统和木材饲料工业做了经济分析，旨在提高木材潜在的综合利用价值。     

直干按能源林高效经营技术及其多效益研究

通过直干按能源林不同密度的造林试验，表明采用合理密植和短轮伐期的经营技术，可以获得较高经济效益。     

三议纸地膜在茄子栽培上的优势

本栏目曾在1998年第4期和第5期对纸地膜在康乃馨和番茄等作物栽培应用方面的特点作了一般的介绍.本期就纸地膜在防止病害发生和盛夏蔬菜生产淡季上显示出的独特优势作进一步的介绍和说明.     

如何减轻果蔬储藏中侵染性病害

采用了辐射与低温臭氧相结合的方法，可以减轻果蔬储藏中的侵染性病害，同时，还可以延长果蔬的保鲜期。