整地施肥对尾叶桉生长效应的研究

整地施肥试验结果表明，全垦，带垦和穴垦３种整地方式及施肥对尾叶桉造林成活率和保存率均没有显的影响，这３种整地处理加上施肥，对促进尾叶桉生长均能取得理想的效果，５年生材积，施肥是不施肥的９．８倍，全垦和带垦整地虽然在一定程度上促进了林木的生长，但在贫瘠的立地上，加施肥料才能达到速丰产经营目的，整地和施肥间的交互作用不明显，施肥对尾叶桉的促进作用可延至５年以后。     

刚果12号桉施肥效应研究

在贫瘠低丘上对刚果１２号桉进行不同肥料配合和不同用量的施肥试验，结果表明ＮＰＫ，ＮＫ，ＮＰ和ＰＫ配合施用的能极显著地促进刚果１２号桉的生长，５年生时蓄积比对照分别增加１９．４０，１８．４５，１６．４０，１５．０５ｍ＾３／ｈｍ＾２，Ｎ，Ｐ，Ｋ肥单施的蓄积比对照纷别增加５．３０，５．２５，４．８０ｍ＾３／ｈｍ＾２肥料的配合施用极显著地优于Ｎ，Ｐ，Ｋ单施，材积的增长量随施肥量的增加而增加。     

长瓣短柱茶施肥研究初报

长瓣短柱茶施肥研究初报＊洪顺山翁月霞杨婉琴庄珍珍关键词长瓣短柱茶施肥肥料配方长瓣短柱茶（ＣａｍｅｌｉａｇｒｉｊｓｉＨａｎｃｅ），俗名攸县油茶或薄壳香油茶，是个珍稀油茶物种。原野生，现只在湖南攸县有较多的分布和栽培，浙江有少量引种。由于其具有抗病、早实...     

修枝间伐对松突圆蚧抑制作用的研究

严重危害广东省沿海地区马尾松的松突圆蚧(Hemiberlesia pitysophila Takagi),自1982年在深圳、珠海等地发现后，至今危害面积约43万ha，其中枯萎或涉死的约8万ha。     

老鸦柿的开发利用

经过５年的试验实践，将野生灌木老鸦柿按其浆果形态的差异区分成３个类型。并对其栽培利用作了较为系统的归纳，将为今后的开发利用提供参考。     

用例研究与应用综述

用例不仅成为软件需求获取中最为重要的技术,而且已经成为软件工程、软件开发方法学、软件体系结构等诸多研究领域的热点。本文从用例的实现、描述和形式化、重用和重构、粒度、用例应用于非功能性需求、跟踪性、用例的评审和检测、用例支持新型软件开发技术、用例支持工具的开发等九个方面回顾了近十年用例研究的状况,对用例研究的进展和涉及的应用领域进行了较系统地归纳,着重提出了用例有待深入研究和解决的问题。     

竹炭性能的研究进展

文章主要根据目前国内的竹炭研究进展的状况．综述了竹炭吸附性能、竹炭导电性能、竹炭改良土壤的性能、竹炭的负离子功效和竹炭的远红外功效的研究进展。     

新亚欧大陆桥经济带沙区土地利用及环境变迁的时空分析模型

本文分析了新亚欧大陆桥经济带及其沙区的发展问题，介绍了国内外对沙漠土地的研究与利用情况，提出了新亚欧大陆桥沙区的经济模式和土地利用及环境变迁的时空分析模型。     

Protein phosphatases 1 and 2A and the regulation of calcium uptake and pollen tube development in Picea wilsonii

To investigate the roles of protein phosphatases 1 and 2A in the development of pollen tubes of Picea wilsonii Mast., pollen grains were cultured in standard medium in the presence and absence of the protein phosphatase inhibitors okadaic acid and calyculin A. At nanomolar concentrations, these compounds blocked pollen tube growth, causing abnormal morphologies of the pollen tubes. Studies with Fluo-3 revealed that the inhibitors reduced the pollen-tube tip-to-base cytoplasmic calcium (Ca(2+)) gradient and arrested extracellular Ca(2+) uptake. The transmission electron microscope observations indicated that the fusion of paramural bodies with plasma membranes occurred frequently in the tip and sub-tip regions of control pollen tubes, but fusion rarely occurred in inhibitor-treated pollen tubes. Staining with aniline blue showed that callose accumulated in the tip regions of inhibitor-treated pollen tubes. Immunolabeling of pollen tubes revealed that acidic pectin epitopes recognized by the monoclonal antibody JIM5 were present in the tip region and on the flanks of the sub-tip in normal pollen tubes. In inhibitor-treated pollen tubes, these epitopes existed only in the extreme tip region and at higher concentrations than in control pollen tubes. The esterified pectin recognized by JIM7 was located preferentially at the extreme tip region in normal pollen tubes, but at basal sites in inhibitor-treated tubes. Fourier transform infrared (FTIR) analysis further confirmed the changes in acidic and esterified pectin distributions and their relative contents. These results suggest that protein phosphatase 1 or 2A, or both, are involved in the regulation of Ca(2+) uptake across the plasma membrane, in exocytotic activity and in the biosynthesis of cell wall components, all processes that occur in the tip region of pollen tubes and that control pollen tube development.     

坟山绿化树种选择及配置模式

"青山白化"严重影响生态环境建设和城市文明形象,已成为亟待解决的社会问题。针对坟山的立地条件与特点,以适地适树、满足绿化主体功能、乡土树种为主以及尊重传统风俗习惯为选择原则,筛选出适合浙南地区的坟山绿化树种。在此基础上,依照营造不同类型的目标林分要求,确定14种坟山绿化配置模式,为"青山白化"区提供绿化治理技术。