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This paper discussed the distribution of forest resources in the tropics, their main types, main characteristics and present management status, and proposed twelve management modes, and these modes include establishing nature conservation region, eco-public-benefit forest management, extravisme, limiting logging and regeneration after logging, logging three and remaining seven method, tropical shelterwood system, sylviculture douce, whole cultivation method, specialized cultivation method, strip clearcutting method, developing tree species of lacking noted and nature regeneration, closing hillsides to facilitate afforestation.

本文对世界热带地区的森林资源分布、基本类型、主要特征、世界次生林的经营现状和主要经营方式讨论。这些经营方式包括建立自然保护区、生态公益林经营、&采掘主义&、限制采伐和伐后更新、&砍三留七&法、&扶持&式育林法、&抑制&式育林法、整体培育法、专门培育法、带状皆伐法、开发欠知名树种、自然更新和封山育林。

Test results show that Rain cultivation have remarkbly effect on velocity of photosynthesis, Stomatic conductance and velocity of transpiration of Rosario Bianco and these factors of value are greater than in Open-air cultivation.

试验表明避雨棚对于'白罗莎里奥'叶片净光合速率、气孔导度与蒸腾速率有显著影响：避雨栽培模式下叶片净光合速率、气孔导度与蒸腾速率均高于露天栽培。

Chromatic plastic film and light conversion film has been applied in protected cultivation, and plastic films with different light quality may serve as a non-chemical approach regulating growth and thermoperiodic responses of plants. A few studies showed that light quality affected growth and yield of strawberry, but little is known about its effects on photosynthesis and chlorophyll fluorescence in strawberry leaves, and fruit quality. So it is beneficial to scientific regulating growth and fruiting for strawberry protected cultivation to study on those effects and the interactions between CO2 and N supply on photosynthesis.

而低氮影响植株生长、叶片黄化，进而影响光合作用，导致抗性减弱和产量品质下降；③CO_2供应问题：目前我国草莓栽培常在设施环境下进行，在封闭性强的设施中空气流通不畅，常导致设施内部CO_2供应不足而影响光合作用，进而影响产量和品质；④光不足与光质问题：设施栽培中，光通过玻璃和塑料棚膜后使设施内的光强与光质均发生改变，这些变化特别是光质变化对草莓生长与结果的影响程度尚无明确认识。

Through analyse of the experiment result, detecting the activity and stability of the Thiobacillus ferrooxidans in this cultivation method is better. It provides a kind of valid cultivation method in engineering.

通过对实验结果的分析发现，该法所培养的菌群活性良好且较为稳定，为该菌在实际工程运用提供了一种较为有效的培养方法。

The phytoparasitic nematodes of Tylenchus appeared in a great lot after cultivation,even though there was only a few could be found in the corms before cultivation.

本研究结果初步表明拟滑刃属、滑刃属和垫刃属线虫具有较高的潜在危险性，其他检出的植物线虫类群潜在风险较小。

When feeding with undecylenic acid by fed-batch culture, there was a lag time when microorganism using undecylenic acid as a new carbon source. The molar fraction of unsaturated monomer could be achieved by 37.39% at 73 hr cultivation. We can see the property of PHA become flexible with cultivation time by the lower of Tg.

发酵槽馈加十一烯酸培养实验，产物为PHO与PHU(poly-3-hydroxy-8-noneneoate为主)所形成之混掺物，且双键所占比例随时间增加，培养第73小时可得到双键比例37.39%；随培养时间增加，玻璃转移温度(Tg， glass transition temperature)由-34.03℃下降至-42.40℃，显示PHA性质变得更加柔韧具有弹性。

The advantages of the simple twice zymotechnics lie in the characters of the cultivation materials, the growth of mycelia, the control of plant diseases and insect pests, the output of Volvariella Volvacea and the production cost. All these indicate that simple twice zymotechnics is a relatively reasonable compost treatment in Volvariella Volvacea cultivation.

简易二次发酵法的栽培材料理化性状、草菇菌丝生长、病虫害控制和草菇的产量、生产成本等，都比自然堆沤发酵法和常规二次发酵法有较大的优势，表明简易二次发酵法是草菇栽培中较理想的一种培养基处理方法。

Cultivation is not possible on high land; in low land water accumulates and makes cultivation possible.

在高处培养是不可能的；水能够在低处积聚，从而从低处开始培养也变得可能。

On such a basis, it concretely discusses the effects of the cultivation on ecological environment and holds the view that the damage of the original hydro geological environment by over-cultivation in South-East China results in the serious situation of "no reservation of water and no irrigation when drought" and thus greatly increases difficulties in flood prevention. Local governments through ages act on their own way without cooperation among diked paddy-fields in different areas and therefore local floods take place every year due to breakdown of the dikes. The great shrinking of lake areas because of too much reclamation affects the function of lakes in adjusting water volume and destroys ecological conditions of the area, leads to frequent disasters.

在此基础上，具体探讨了圩田开发对生态环境所造成的影响，认为因过渡围垦破坏了江南地区原有的湖泊河流水文环境，造成&水不得停蓄，旱不得流注&的严重局面，这便给圩田大大增加了防患水灾的压力；历代地方政府在圩田管理方面也是各自为政，各地圩田缺乏相互间的协作，使因破圩而形成的局部水灾年年有之；大量构筑圩田，使湖泊面积大为缩小，影响其调节水量的功能，破坏了本地区的生态条件，致使灾害频频发生。

On such a basis, it concretely discusses the effects of the cultivation on ecological environment and holds the view that the damage of the original hydro geological environment by over—cultivation in South—East China results in the serious situation of "no reservation of water and no irrigation when drought" and thus greatly increases difficulties in flood prevention. Local governments through ages act on their own way without cooperation among diked paddy—fields in different areas and therefore local floods take place every year due to breakdown of the dikes. The great shrinking of lake areas because of too much reclamation affects the function of lakes in adjusting water volume and destroys ecological condi- tions of the area, leads to frequent disasters.

在此基础上，具体探讨了圩田开发对生态环境所造成的影响，认为因过渡围垦破坏了江南地区原有的湖泊河流水文环境，造成&水不得停蓄，旱不得流注&的严重局面，这便给圩田大大增加了防患水灾的压力；历代地方政府在圩田管理方面也是各自为政，各地圩田缺乏相互间的协作，使因破圩而形成的局部水灾年年有之；大量构筑圩田，使湖泊面积大为缩小，影响其调节水量的功能，破坏了本地区的生态条件，致使灾害频频发生。

He is intelligent, passionate, and a fun guy to hang around with.

他聪明、热情，而且是个相处起来很有趣的人。

First-rate method is to send a person to do mastication technically to digest these stuffs.

最佳的办法是派一个人专门干咀嚼消化这些东西。