云南不同气候带农业气候资源变化特征研究

为分析全省平均以及各气候带光能、热量、水分资源的时空变化特征,使用云南115站及6个气候带代表站1961—2018年的气候要素计算各地农业气候资源统计量。结果表明,光能资源变化以减少趋势为主,出现显著突变,各气候带太阳辐射变化可能会引起云南太阳辐射高低值中心发生变化,2009年以来辐射明显增加可能会导致太阳辐射出现新的变化趋势和突变点;热量资源一致显著增加,喜凉及喜温作物的活动积温、积温持续时间及无霜期长度均显著增加,并且呈现初日提前、终日推后的趋势,对作物生长有利;水分资源总体呈现减少趋势,尤其21世纪以来下降趋势明显,亚热带地区暖干化现象突出,干旱风险等级较高。     

气候变化情景下流苏香竹潜在分布区预测

流苏香竹（Chimonocalamus fimbriatus）是云南特有珍稀竹种，主要分布于云南西南部。文章以野外调查获取的流苏香竹分布信息为主，运用最大熵模型（MaxEnt）同时结合地理信息系统（ArcGIS），基于19个气候因子，预测其在当前及未来气候变化情景下的潜在分布区。结果表明：当前流苏香竹的高适生区和中适生区主要分布于德宏州、保山市和临沧市等地，除迪庆州、丽江市和昭通市外，云南其他区域均有低适生区零星分布。在未来2050s和2070s的2个时间段，基于2种不同共享社会经济路径（SSP1-2.6和SSP5-8.5），流苏香竹的高适生区面积呈减少的趋势，尤其是SSP5-8.5路径下，高适生区面积仅为当前的12.51%（2050s）和18.63%（2070s）；中、低适生区在SSP1-2.6路径下，显著扩张（2050s）或略微扩张（2070s），在SSP5-8.5路径下，则大幅收缩。流苏香竹野外实际分布区及其潜在分布区均以斑块状为主，可能与云南特殊的地形、地貌有关。影响流苏香竹分布的主导气候因子为最湿月份降水量、最暖月份最高温度、最干季度降水量和平均气温日较差。流苏香竹对气候变化比较敏感，根据其野外分布状况，建议以就地保护为主、迁地保护为辅，在其潜在适生区内适当引种栽培。     

云南野生食用菌生态休闲观光旅游探索

得天独厚的地理环境和悠久的野生食用菌历史,奠定了云南野生食用菌的重要地位与属性,云南也逐渐将野生食用菌资源纳入到生态休闲观光旅游的范畴,并成为云南旅游经济新的增长点。结合云南的野生食用菌栽培及旅游模式开发的现状,发现云南在野生食用菌生态休闲观光旅游探索上存在的问题,通过对问题的分析与解决,对云南野生食用菌的生态休闲观光旅游建设具有一定的指导意义。     

福建黄兔繁殖性状相关研究

本文对３１０只母兔的繁殖性状进行了测定分析，结果表明；妊娠期与产仔数、产活仔数及活仔窝重呈负相关，相关系数分别为－０．４２６＊、－０．３５０＊和－０．５１５头４胎内母兔，胎次对产仔性能无影响，对母兔泌乳性能有一定影响。同样条件下胎次增加。泌乳性能提高，第３胎较第２胎有显著提高。     

Study on Cultural Technologies and Salt-resistance of Nitraria sibirica in Coastal Areas with Serious Salt-affected Soil

In this research, five Nitraria sibirica provenances such as Dayilu were selected to do experiment of salt-resistance, combining fixed plots test with typical plot investigation, measuring survival rate and growth as main indicators. The experiments of main cultural technology were done on Nitraria sibirica in 4 types of site preparation, 3 types of planting, 3 designs for planting density. The Nitraria sibirica experiments for the effects of curbing salt and improving soil were done by testing soil nutrients, salt content, soil physical properties as focal points in typical site of 3-4 years woods. The experiment results showed that the Nitraria sibirica could survive well with soil salt content of 0.6%, and that survival rate declined distinctively as soil salt content exceeded 0.8%. However, high soil salt content did not influence growth in the year of planting. There were obvious differences in salt-tolerance among Nitraria sibirica provenances; Dayilu was the best on salt-tolerance, the other 4 pro     

我国中央山系东段演化及其对黄河河道及东平湖的影响

根据2603a有史记载以来黄河河道变迁和春秋以来东平湖演变历史，本文提出我国中央山系东段碰撞和松弛导致的地势上升和下降是影响黄河河道变迁和东平湖演变的重要因素。山系碰撞上升造成黄河河道向北西迁移，东平湖湿地北漫；山系松弛下降导致黄河河道向东南迁移，东平湖南泛。     

夏海黄三元杂种牛生长发育研究

测定分析了夏海黄三元杂交后代（公牛３４头，母牛３７头）与豫北黄牛及海黄Ｆ１初生－２４月龄体尺与体重均较豫北黄牛有较大幅度提高，较海黄Ｆ１提高明显，利用夏海黄三元杂交发展肉牛生产是一条有效途径。     

Studies on mutlispecific resistance of gastrointestinal nematodes to benzimidazoles on dairy-goat farms

Multispecific resistance to benzimidazoles was studied in three selected farms. These farms had bred dairy goats for more than 15 years. The helminths were introduced with the goats at the establishment of the farms which afterwards remained isolated. Nematode resistance could then be related to their own management practices. Faecal egg count tests and egg hatch assays were performed to assess intensity of resistance. The generic (infective larvae in faecal cultures) and specific richness (adult worms) were assessed. The resistant species were Trichostrongylus colubriformis, Teladorsagia circumcincta, Haemonchus contortus and Oesophagostomum venulosum. Faecal egg count reduction tests and egg-hatch assays did not match exactly. Faecal larval counts after treatments gave a distorted picture of multispecific resistance: Haemonchus and Oesophagostomum were very largely over represented. The number of species found in the three farms was relatively low compared with other reports in goat farms of the area. This reduction of diversity might also be due in part to characteristics of breeding management and history (use of permanent pasture and introduction of goats at the establishment of farm).     

胡萝卜黄色突变体的遗传及表现研究

 从胡萝卜‘新黑田五寸’品种的高世代自交系中发现了能稳定遗传的黄色突变体。遗传分析证明该黄色突变性状为单基因隐性遗传, 绿色对黄色为完全显性。黄色突变体叶片中叶绿素含量仅为正常株的29.3% ～50.1% , 且黄色不受温度光照等环境的影响。黄色突变体( yelyel) 地上部和地下部的生长量明显少于正常株系( YELYEL ) , 但在等位基因杂合时( YELyel) 与正常株系的生长量、产量和营养品质无显著差异。     

内蒙古山羊流产病毒的特性研究

1990－1992年从野外山羊流产的胎儿中分离到2株病毒。1994年又从野外自然流产的山羊胎盘中分离到1株病毒。用琼脂扩散试验做交叉反应，证明3株分离病毒属于同一种病毒。用FUDR抑制试验鉴定其核酸型为RNA，在电镜下为圆形颗粒，直径约60－70mm，其能在BHK21，Vero细胞上和鸡胚中增殖，产生明显的CPE。将其回归孕山羊，引起51．2％（21／41）流产。研制的福氏完全佐剂灭活苗初试与对照比较，可使流产降低46％，血清学反应证实其与BTV，IBARKIV，EHDV，AKBV无相关性。