根的

7Gm〓 in the 20 yr forest, 1139. 8gm〓 in the 80 yr forest and 912. 4 gm〓 in the climax forest, respectively. However, along with forest succession, the dominant tree species fine root annual production increases, whereas other arboreal and grass fine root annual production decreases.

白桦山杨幼林、白桦山杨成熟林与原始阔叶红松林中，细根年生长量分别为712.7gm〓、1139.8gm〓和912.4gm〓；但是，随着演替的进行，林地主要树种细根的年生产量会逐渐增加，其它木本和草本细根的年生产量则逐渐降低。

The recent advances in the taxonomy of orchidaceous mycorrhizal fungi and diversities of fungal resources were reviewed, and morphology of orchid mycorrhizae as well as their effects on orchid plants were discussed.

对兰科菌根真菌的分类及真菌资源多样性、兰科菌根的形态和菌根对兰科植物的效应等最新研究进展进行了综述。

In the second part, it is argued that the effect of Novum Organum on the philosophy and science is just as the function of beacon. The thesis in this part systematically introduces Bacon\'s basic and extensive thoughts excluding Baconian Induction, Theory of the Idols and the Empirical Epistemology that people have thoroughly researched; moreover, the mistakes which people have made are corrected and the limitations of the viewpoints of Novum Organum are also focused on. In the third part, Bacon\'s basic and extensive scientific and technological researches are discussed. Regarded to this, the thesis finds that people only paid attention to Bacon\'s view that heat is a motion which Bacon took lots of space in Novum Organum to summarized according to Baconian Induction.

本文总共分为四大部分：首先，分析《新工具》是对亚里斯多德《工具论》的勇敢挑战，并着重论述了培根的政治和文化背景对他的新思想所造成的深刻影响；其次，系统探讨《新工具》在哲学和科学中起到的灯塔作用，本文论述了培根的基本哲学和科学思想及具体应用和反映，但是对前人已深入探讨过的培根式归纳法、四假象说和经验认识论不再论述，同时对前人的一些误读进行澄清，并分析培根的《新工具》在哲学和科学思想方面的局限；再次，对前人很少涉猎的《新工具》中的科学研究方面进行系统论述，本文发现人们基本上仅仅注意到了培根在《新工具》中大篇幅运用培根式归纳法进行举例论证的热动说，而对这本书中其他的科学研究不甚关注。

In the second part, it is argued that the effect of Novum Organum on the philosophy and science is just as the function of beacon. The thesis in this part systematically introduces Bacon"s basic and extensive thoughts excluding Baconian Induction, Theory of the Idols and the Empirical Epistemology that people have thoroughly researched; moreover, the mistakes which people have made are corrected and the limitations of the viewpoints of Novum Organum are also focused on. In the third part, Bacon"s basic and extensive scientific and technological researches are discussed. Regarded to this, the thesis finds that people only paid attention to Bacons view that heat is a motion which Bacon took lots of space in Novum Organum to summarized according to Baconian Induction.

本文总共分为四大部分：首先，分析《新工具》是对亚里斯多德《工具论》的勇敢挑战，并着重论述了培根的政治和文化背景对他的新思想所造成的深刻影响；其次，系统探讨《新工具》在哲学和科学中起到的灯塔作用，本文论述了培根的基本哲学和科学思想及具体应用和反映，但是对前人已深入探讨过的培根式归纳法、四假象说和经验认识论不再论述，同时对前人的一些误读进行澄清，并分析培根的《新工具》在哲学和科学思想方面的局限；再次，对前人很少涉猎的《新工具》中的科学研究方面进行系统论述，本文发现人们基本上仅仅注意到了培根在《新工具》中大篇幅运用培根式归纳法进行举例论证的热动说，而对这本书中其他的科学研究不甚关注。

The root dry matter accumulation was affected more intensively by Zn(superscript 2+) than the plumule, and which indicated that the root was more sensitive to exterior Zn(superscript 2+).

结果表明，外源Zn(上标 2+)供应可显著提高幼苗根和芽的干重，对小麦幼苗根的影响大于对芽的影响，根对Zn(上标 2+)更为敏感。

Objective: To investigate the root canal configuration and the incidence and location of the isthmus in extracted maxillary second premolar with single root.

目的：研究离体单根的上颌第二前磨牙根尖1—6mm处根管形态及根管峡部的发生率和位置的情况。

According to the first and second references, a sufficiency and necessity condition on rational root of integral coefficients polynomial is put forward and a reduced method of testing the rational root is also shown in this paper.

摘要给出了整系数多项式有理根的一个必要条件，从而得到整系数多项式有理根检验的一个简化方法，达到了简化整系数多项式有理根检验的目的。

Experiments were conducted for testing root tensile strength and measuring root cellulose content of Medicago sativa and Digitaria sanguinalis. Results indicated that in the two species, both the tensile strength and percentage of cellulose were negatively correlated with root diameter, while a positive correlation was found between percentage of cellulose and tensile strength. The conclusion confirmed that the relationship among root tensile strength, root diameter and root cellulose content found in tree root system was held also in the two species.

对豆科的紫花苜蓿和禾本科的马唐根的抗拉力和纤维素含量的研究表明，根的抗拉强度和纤维素含量均与直径呈显著的负相关关系，根的抗拉强度与纤维素含量呈正相关关系，表明&木本植物根的抗拉强度、直径和纤维素含量关系&的研究结论在这两种草本植物上也同样适用。

The results showed that the growth of root tips in liquid medium was better than that in agar-solidified medium and solid-liquid two phase medium, for that increasing agar concentrations in medium will reduce the root growth; darkness was beneficial for Fraxinus mandshurica root tip culture in vitro; as the carbon sources, sucrose was better than glucose and maltose as the carbon ...

结果表明，不添加琼脂的液体培养基对根尖的生长较添加琼脂的固体培养基和固—液培养基好，原因是增加琼脂的量会抑制根的生长；暗培养比光培养更有利于水曲柳离体根尖的培养；蔗糖作为碳源的效果较果糖和麦芽糖好，其中以3%的蔗糖对离体根尖的生长效果最好。

N algorithm for close approach determination was developed by Alfano and Negron （1993） based on polynomial splining techniques.

lfano—Negron（1993）提出的空间目标接近分析算法将最小相对距离及其对应时刻和进出误差椭球时刻的求解问题均转化为插值多项式求根问题。A—N算法在判断三次多项式根的存在性、筛选合理实根时存在缺陷，可能导致多余计算。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。