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 heatkeeping ,chilling prevention or cooling and rainproof facilities to prevent the crops production from being influenced or seriously done by natural seasons and toartificially create a microclimate environment suitable for growing horticultural crops in cold or hot weather hat actually unfavorable to the crop development .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 providea variety of vegetable seeding for open field or protected culture or protect seedingof cold tolerant vegetable living through the winter ,for early planting andacquirement of early mature products.3、In respect of structure type, the largest horticultural structure area in our countryconsists of plastic tunnels and lean to houses, especially the energy-sawing solar greenhouse, which has become the dominant greenhouse type in the country. Presently the development of large greenhouse or multi-span house has been initiated. Lesson2 part A4、In horticultural crop cultivation under structure the key point of environment managementfor growers is to create optimal complex of environmental conditions for crop growth and development, as possibly 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 ofspecific nutritional elements and ph adjustment2、the soil is an important constitute of the land loamy soil must consist of soul particleswith proper ratio ,with equilibrium of nutrients ,in which contains some organic matter ,and with considerable moistureLesson5 part ALesson6 part A1、sink demand of horticultural crops extremely affects photosynthetic ,for example ,leafphotosynthesis noticeably 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 the source-sink ratio increases significantly ,some old leaves can renew their photosynthesis functions ,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 simplestexplanation is that photosynthesis accumulated in leaves restrain photosynthesis .however trials for examining this hypothesis usually obtained the oppositeresults .furthermore ,in practice ,photosynthates seemly not accumulate besidechloroplasts in mesophyll cells .thus ,more research work should be done on source-sink relationship to improve yields of horticultural cropsLesson7 part A1、the development of horticultural crops product organs consist of maturity 、full ripenessand senescence stages .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 forharvest ,such as leaf vegetables ,when they are reaped ,they are not physiological 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 ,while some must ripen after separated from trees .after full ripen the fleshmealiness aroma strength proper acidity and sugar ,senescence is a stoppingterminating process of living activity. In this stage, product organs quality of horticultural crops become bad and completely leaves their economical value in the endLesson8 part A1、hormone produced by seed influence fruit setting ,fruit growth and the balance of hormonesin plant2、Stone fruits can no t set their fruits when their embryos develop abnormally. pome fruitscan set without seeds ,but flesh cells grow slowly3、Gibberellins was produced after pollination with seed development gibberellins promotessynthesis of auxin , 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 andresult in alternate fruiting .alternate fruiting is not normal in pear and many stone fruits .it is because the early occurrence of gibberellins synthesis peak which is not concurrent with flower differentiation initiation.Lesson13 part A1、pruning of fruit trees is a practice involves the heading back cuts and the thinningcuts of branches for good framework ,for regulating contradiction between growth and fruiting ,for maintaining the equilibrium 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 andcultivars ,the climate the 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 fromstimulating excessive sprouts .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 to simulate fruiting.Lesson15 part A1、temperature is an critical element in biological ,chemical and physiological processesof all plant species2、Temperature regulates the rate of chemical reactions ,leading to the adjustment of plantgrowth rate.3、As a important contributing factor to climate .temperature play an important role inadaptability and growth ,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-temperaturesensitivity limit the successful cultivated regions of plantsLesson16 part A1、sprinkler irrigation is often used in maintaining and flower beds which has the specialtythe uniform water 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。