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This paper reviewed microsclerotia or spores in soil are stimulated to germinate by host root exudates, hyphae colonizes on the surface of root, pathogens penetrate epidermis and develop in cortex, expand on stem and leaf, and symptom development, shows that host plant develops various barriers to restrain this fungus invasion.

本文系统探讨了土壤中微菌核或孢子受寄主根系分泌物的刺激，开始萌发、产生的菌丝在寄主根表面定殖、穿过表皮、在皮层中发生及在寄主体内扩展和症状形成等黄萎病菌侵染棉花的过程，阐述了寄主植物形成多级防御反应阻击病原菌的入侵。

With the increasing of NO3- concentration, the biomass, root absorbability and root absorbing area declined under NaNO3 treatment. The biomass was gradually increased with NO3- concentration increasing under Ca(NO3)2 and KNO3 treatments, while NO3- concentration excessed 98 mmol·L-1, the fresh weight of cucumber seedlings was gradually decreased.

NaNO3处理条件下，随着NO3-浓度增加，黄瓜幼苗生物量降低、根系吸收能力及吸收面积下降；而低浓度Ca(NO3)2及KNO3处理下，黄瓜幼苗生物量随着NO3-浓度增加而增加，当大于98 mmol·L-1时，黄瓜幼苗鲜重逐渐降低。

In details, the strongest inhabitation to the shoot growth was observed when neutral soluble fractionates were supplied. The shoot biomass with neutral soluble fractionates added was decreased by 10.52% over the blank control, resulting in obvious increase of root: shoot ratio. It suggests that the root exudates would be self-poisonous. Besides, both acid and alkaline soluble fractionates exhibited the trend to increase the stem height and it is necessary to exploit the reasons.

在培养液中，分别加入分组的烤烟根系分泌物，均显著降低根系对NO_3~-、H_2PO_4~-、K~+离子的吸收和根系活力，推测根系分泌物中产生抑制作用的物质可作用在相当宽的pH范围；其中，碱溶性组分对H_2PO_4~-、酸溶性组分对K~+、中性组分对NO_3的吸收和根系活力的抑制作用较强，推测在烤烟根系分泌物中，可能存在多种抑制烤烟生K和养分吸收的化学物质；另外，抑制作用随着根系分泌物浓度的增加而增强。

After analyzing the structure-stability of tunnel opening, the author brings forward the superficial-stability-analysis method of greened sloping field of tunnel opening, which bases on the root-distributing character and the mechanical root-soil model of herbaceous plants.

在分析洞门结构自身稳定性的基础上，根据植物根系的分布特征，以及草本植物根—土相互作用力学模型，提出了隧道边、仰坡绿化后坡体浅层稳定性的分析方法。

In the present study, two soybean genotypes (BZ10 and BL2) differing in root architecture and phosphorus efficiency were intercropped with a maize cultivar (Huatian 1) in a field experiment to assess the effects of soybean root architecture on nitrogen and phosphorus nutrition of the intercrops.

在温室的根箱试验中发现，浅根型、磷高效率的大豆品种巴西10号根系在土壤有效磷相对较高的表层分布较多，其表层的根系数量和长度均显著地高于深根型、磷低效率品种本地2号。同时巴西10号的根系与玉米根系接触较多。

Starting at the root apex, the transverse section was stained with methylene blue dye after 1-mm root was resected, and viewed with a surgical operating microscope. The number of canals as well as the presence and type of canal isthmuses were recorded.

自根尖开始，片切去除1mm牙根后，用美蓝染色根切面，在显微镜下观察并记录各横截面的根管数和峡部分布情况。

Amputation organizations were drawed by homemade iris hook, drawing to limbal incision,suturing through cornea incision anterior lip to 0.5mm away from iris root with 100 nylon line,and then the root of the iris suture about 0.5mm, and then were ligatured and sutured through the corneal incision posterior lip.

使用自制的虹膜钩勾取离断的虹膜组织，拉至角膜缘切口处，用100尼龙线经角膜切口前唇、缝合虹膜根部约0.5mm，然后再穿过角膜切口后唇出针，结扎缝线。

This follows hither opportunity insufficient, this opportunity, actually Chinese Internet develops also be very careless root more very, careless root has good one side to also have bad one side.

这个跟在这边的机会不够，这个机会，其实中国互联网发展很多也是很草根的，草根有好的一面也有不好的一面。

In fact, most careless root still is be ignored or be regarded as merely base alludes, and the author that becomes famous with careless root identity, evolving gradually for new elite, even these famous grass roots people have the desire that makes elite.

事实上，多数的草根仍是被忽视或仅仅被当作基数提及的，而以草根身份成名的作者，正逐渐演变为新的精英，甚至这些知名草根们都有成为精英的欲望。

The odd and beautiful wood root was carefully chosen, which was set in the upper part of the steel plate, and the top of root obtrudes the upper frame of the steel plate. The overall composition is in picturesque disorder.

树根经过精选，奇美而又质朴，它被置于钢板上半部，顶部冲出钢板的上边框，显出不齐之齐的错落韵致。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。