园艺专业英语翻译（中→英）Lesson1 part A1、protected (structure) horticulture is defined as a cultivation method taking use of heat keeping ,chillingprevention or cooling and rainproof facilities to prevent the crops production from being influenced or seriously done by natural seasons and to artificially create a microclimate environment suitable for growing horticultural crops in cold or hot weather hat actually unfavorable to the cropdevelopment .it is also termed as out-of-season culture ,season-off culture or forcing culture .because of the season in which horticultural crops are planted is hand for their growing in open field.2、Windbreak、cold –frame 、hot-frame、plastic-clad tunnel and greenhouse could provide a variety ofvegetable seeding for open field or protected culture or protect seeding of cold tolerant vegetableliving through the winter ,for early planting and acquirement of early mature products.3、In respect of structure type, the largest horticultural structure area in our country consists of plastictunnels and lean to houses, especially the energy-sawing solar greenhouse, which has become thedominant greenhouse type in the country. Presently the development of large greenhouse ormulti-span house has been initiated.Lesson2 part A4、In horticultural crop cultivation under structure the key point of environment management for growersis to create optimal complex of environmental conditions for crop growth and development, aspossibly as they can, according to properties and environmental demand of crop.Lesson3 part ALesson4 part A1、most soil amendments are consisted of the increasing of organic matters ,addition of specific nutritionalelements and ph adjustment2、the soil is an important constitute of the land loamy soil must consist of soul particles with properratio ,with equilibrium of nutrients ,in which contains some organic matter ,and with considerablemoistureLesson5 part ALesson6 part A1、sink demand of horticultural crops extremely affects photosynthetic ,for example ,leaf photosynthesisnoticeably decrease when potato tubers are removed during their growth short-term response may be stomato close effect ,but this cannot explain common continuous effects ,sometime when thesource-sink ratio increases significantly ,some old leaves can renew their photosynthesisfunctions ,on the other hand ,rapidly growing sinks sometimes compete with leaves for mobilizable nitrogen and this results in abscission of leaves and lower photosynthesis capacity.2、It is not clear yet that how the sink demand affect photosynthesis of leaves .the simplest explanation isthat photosynthesis accumulated in leaves restrain photosynthesis . however trials for examining this hypothesis usually obtained the opposite results .furthermore ,in practice ,photosynthates seemly notaccumulate beside chloroplasts in mesophyll cells .thus ,more research work should be done onsource-sink relationship to improve yields of horticultural cropsLesson7 part A1、the development of horticultural crops product organs consist of maturity 、full ripeness and senescencestages .maturity includes physiological ripeness and horticultural ripeness the former means that in the last growth stage ,mature organs become full ripening and the later means the best growth stage of horticultural crops for harvest ,such as leaf vegetables ,when they are reaped ,they are notphysiological ripe ,and flower crops are harvested when thy flower.Full ripeness is the develop stage after fruit mature some fruits can get full ripeness in trees ,whilesome must ripen after separated from trees .after full ripen the flesh mealiness aroma strength proper acidity and sugar ,senescence is a stopping terminating process of living activity. In this stage,product organs quality of horticultural crops become bad and completely leaves their economicalvalue in the endLesson8 part A1、hormone produced by seed influence fruit setting ,fruit growth and the balance of hormones in plant2、Stone fruits can no t set their fruits when their embryos develop abnormally. pome fruits can set withoutseeds ,but flesh cells grow slowly3、Gibberellins was produced after pollination with seed development gibberellins promotes synthesis ofauxin , therefore ,promotes fruit setting .the fruit set and fruit growth is similar between the ovule not pollinated treated by gibberellins and those which has seed4、Gibberellins produced by apple seeds apparently restrain flower differentiation and result in alternatefruiting .alternate fruiting is not normal in pear and many stone fruits .it is because the earlyoccurrence of gibberellins synthesis peak which is not concurrent with flower differentiationinitiation.Lesson13 part A1、pruning of fruit trees is a practice involves the heading back cuts and the thinning cuts of branches forgood framework ,for regulating contradiction between growth and fruiting ,for maintaining theequilibrium between vegetative growth and propagative growth and for good sunlight exposure, to fruit early to achieve high yield and to get commodity with high quality2、the pruning methods are best determined by the characteristics of fruit species and cultivars ,the climatethe soil condition and the crop developing stages and growth status .in order to get the best result ,it is useful to combine pruning with other cultural practices like fertilization ,irrigation, etc3、Reinvigoration of trees is better performed annually, which can keep fruit from stimulating excessivesprouts .remove dead branches, sprouts and some crossing shoots. Secondly, large branches should be thinned out gradually to open tree chamber and to improve distribution of sunlight in order tosimulate fruiting.Lesson15 part A1、temperature is an critical element in biological ,chemical and physiological processes of all plant species2、Temperature regulates the rate of chemical reactions ,leading to the adjustment of plant growth rate.3、As a important contributing factor to climate .temperature play an important role in adaptability andgrowth ,date of plant thus the horticultural crop types which can be cultured in a specific area rely on temperature4、Most plants can live and grow in the range of 0 to 50℃ .however low-temperature sensitivity limit thesuccessful cultivated regions of plantsLesson16 part A1、sprinkler irrigation is often used in maintaining and flower beds which has the specialty the uniformwater amount in its coverage .however, water waste occur when sprinkler is not limited in the area need irrigation .in addition ,evaporation result in some water loss too。