内源赤霉素与油菜不同种性品种花芽分化的关系的研究

运用放射免疫分析法(RIA)发现油菜花芽分化前后种性与内源赤霉素(GA_3)含量的关系是冬性<半冬性<春性<春油菜。正、反交杂种比较表明GA_3含量具有杂种超亲现象而无细胞质遗传或母性影响。对半冬性品种分期播种材料分析表明,播种期对内源GA_3水平影响很大。不同发育期比较显示:五叶期GA_3水平较低,至花芽分化开始时明显上升,然     

小兴安岭林区低质林类型的界定与评价

利用对小兴安岭林区典型低质林进行实地调查获得的样地森林资源的详细资料,应用多元统计分析理论对林分树种、林分密度、林分径级、林分多样性和丰富度以及土壤状况等进行了分析,筛选造成低质林分的主要影响因子.在分析主要因子变化过程的基础上,确定了低质林划分的技术参数,据此划分了低质林的不同类型:非经济型低质林、低密度型低质林、草原型低质林、生长潜力型低质林和高肥低效低质林.     

新疆甜菜花叶病发生和病原病毒的研究

1995-1998年对新疆甜菜主产区甜菜花叶病的发生进行了调查。采集花叶标样191个,并对毒原种类做了分离鉴定,结果表明,甜菜花叶病有4种症状类型,且有不同的地区分布,又由不同的病毒侵染所致,这些病毒是甜菜花叶病毒（BMV）,黄瓜花叶病毒（CMV）和真菌传杆状病毒属（Furoviuses)分离物,CMV自然感染甜菜在国内尚属首次报道。     

不同形态氮肥对春小麦品种籽粒淀粉及其组分的调节效应

以不同亚基组成且品质类型不同的6个春小麦品种（东农7742、新克旱9、泉224、辽10、Roblin和龙麦26）为试验材料,研究了淀粉及其组分积累规律、不同形态氮肥（酰胺态氮、硝态氮和铵态氮）对淀粉及其组分积累的调节效应及不同品种淀粉与蛋白质的消长关系。结果表明,供试HMW-GS组成品种的淀粉及其组分的积累存在基因型差异,     

贵州红山茶观赏种质资源研究

采用单株调查法和样方调查法对分布于贵州清镇九龙山、宝塔山的贵州红山茶的生境、植物学特征进行调查研究.结果显示：贵州红山茶花蕾形状、花色、叶形等形态特征存在多种差异,观赏价值很高,通过对比跟踪分析,以叶和花对观赏影响程度进行划分,初步划出贵州红山茶5个观赏种质类型,以期为今后开发利用提供理论参考.     

温光生态因素对不同类型水稻幼穗分化期长短的影响

通过连续三年的水稻分期播种试验,对不同类型品种幼穗分化期的长短与温光生态因素的关系进行了探讨研究。结果表明,不同类型的水稻品种幼穗分化期的长短受日照时数和日均温的影响。与日照时数多少呈正相关,与日均温高低呈负相关。     

余甘子

余甘子是我省重要的野生经济林木,数量多、分布广、生长快、结果早、产量高,树皮和木材也很有用途,它不仅耐干旱瘠薄、保持水土,是干热河谷的主要树种,而且也是低海拔荒山造林的先锋树种,经济效益高,可以综合利用,值得大力种植发展。     

我国人工草地类型划分探讨

探讨了人工草地的概念和类型划分的意义,借鉴国内人工草地分类研究成果,依据人工草地的分布区域、生产作用、牧草成分及建植方式,对我国人工草地的基本类型进行了划分。     

论经营类型与小班经营法在森林分类经营中的综合运用

在分析经营类型与小班经营法各自存在利弊的基础上，尝试性地将两种方法在森林分类经营中综合起来并加以改进，提出了分类经营类型－分类经营小班这一新的森林分类经营体系，旨在为分类经营理论和实践上提供指导意义。     

Long-term field experiments of the world

Long-term field experiments are indispensable sources of knowledge. They are vitally important in monitoring, understanding and proving the changes in soil fertility occurring as a result of long-term agrotechnical operations, first of all that of fertilization. Because of longevity, it is fairly costly to maintain them. Their scientific and practical value is, however, immeasurable and keeps growing with their age. The information concerning the land use can not be replaced by other means. The oldest long-term experiments that have run continuously since their foundation are 160-years-old now. They were established at Rothamsted in England by the Rothamsted Experimental Station's founder J. B. Lawes and J. H. Gilbert in 1843. The scientific work of J. von Liebig, the German chemist, who drew up the theory of the increase of soil fertility, has also contributed to the foundation of the Rothamsted Classic Experiments to a large extent. In those days heated discussions about nutrient recycling incited the experimentation and scientific investigation. The experimentation in England has focused attention on long-term field experiments, and such experiments were soon set up in other lands too. In our days long-term experiments of more than 100 years can be found in six lands. These provide results characteristic first of all for the given site, however they concentrate attention on universally valid, surprisingly actual relations of cause and effect as well. These experiments are of great help to us to reconcile ecological and economic interests and to clear up actual questions of environmentally friendly nutrient supply and sustainable husbandry.