過冬作物 的英文怎麼說
中文拼音 [guòdōngzuòwù]
過冬作物
英文
winter cropoverwintering crop-
Land left in bare fallow to be sown with winter crops sustained losses that far exceeded the rate of new soil formation.
留作播種冬季作物的休耕地所經受的土壤流失遠遠超過土壤生成的速率。Previous researchers have always determined the sp atial distribution patterns ( sdp ) of castanopsis kawakamii with a sample - dis tance method. however, the distribution patterns may be affected by the quadrat si ze and, in the course of analysis, the density differences among the cluster plots are not considered ; therefore, differences of cluster plot size and the dispersi on degree among individuals of cluster plots can not be known. authers of this pa per have determined the spatial distribution patterns of castanopsis kawakamii population in different habitats by means of non - quadrat distance method and a nalysed the pattern intensity and grain of the sdp. the pattern intensity is defi ned with the relative density differences and the pattern grain can embody the d ispersion degree of the individuals in the plots, and the dispersion degree among the plots. the determined results are as follows. the intensities of the species range in order from strong to week : litsea mollifolia p. kawakamii i. purpure a r. cochinchinensis c. kawakamii c. carlessii d. oldphamii s. superba. the gra ins of the species queue in order from coarse to close : s. superba = litsea mollif olia r. cohinchinensis c. kawakamii = i. purpurea c. carlessii p. racemosam d. oldp hamii. these determined results tally basiclly with the results authers of this paper have got in determining the same plots by means of aggregate index access ing method. in view of this, it is held that the sdp of c. kawakamii is closely related to the habitats and biological features
前人都是採用樣方方法對格氏栲種群數量的空間格局進行測定,而格局分佈有可能受樣方大小的影響,且分析過程中沒有涉及聚塊間密度差的問題,因而無法掌握種群的聚塊大小差別及聚塊內個體間的離散程度.本研究採用無樣方距離法,測定不同生境的格氏栲種群空間格局,分析格氏栲種群格局的強度和紋理.強度以聚塊和間隙的密度差來定義,紋理則是體現聚塊內個體間的離散程度與諸聚塊間的分離程度.測定結果表明,格氏栲種群格局強度從高到低排列次序為:木姜子蚊母樹冬青茜草樹格氏栲米櫧虎皮楠木荷;格局紋理從粗到細的順序是:木荷=木姜子茜草樹格氏栲=冬青米櫧蚊母樹虎皮楠.這一測定結果與作者採用聚集度指標測定相同樣地格氏栲種群空間格局的結果基本相符.因此,格氏栲空間格局類型及分佈與格氏栲生物學特性及生境的關系密切Secondly, many crop water parameters, including eta, wue and water sensitive parameters etc., were studied through onsite experiment, typical household survey and other methods. by analyzing crop water usage characteristics, we concluded : 1. about eta : the amout of pear water consumption was highest ( 750. 2mm ), however, the watermelon planted in greenhouse consumed only 266. 5mm ; 2
通過對大田作物需水量與自然降水量的平衡分析,可以將順義區主要大田作物分為三類: 1 )灌溉需求量較大的作物,包括水稻、冬小麥、苜蓿、棉花; 2 )灌溉需求量較小的作物,包括夏播作物(夏玉米、夏花生、夏大豆)和耐旱、避旱作物(高梁、穀子) ; 3 )中間型作物,包括大部分春播作物(春玉米、春花生、春大豆等) 。As farmers, however, they had to plant crops in time to harvest them before winter
不過,作為耕作者,他們只能在合適的時間種植作物以便在冬天之前收獲。Weeds compete with crops for moisture, nourishment and light, moreover, they are hosts of disease or the place where disease survives in the winter, which influences the output and quality of crops
雜草與農作物競爭水分、養料和光照,影響農作物的產量、品質,還是許多病害的中間寄主或越冬場所,通過除草劑來控制雜草已成為現代化農業不可缺少的一部分。The main conclusions were as follows : 1. calculation of environmental capacities of nutrients in jiaozhou bay : the largest values of self - purification capacities of din and po4 - p are in summer, and the smallest are in winter and the similar intermediate values in spring and autumn
膠州灣營養鹽環境容量:膠州灣din和po _ 4 - p營養鹽自凈容量都是夏季最大,冬季最小,春秋居中,這主要是海洋中物理、化學和生物自凈過程共同作用的結果。Based on those, the concept of chilling process was put forward according to the lowest biologic temperature of main tropic and south sub tropic crop and fruit in guangdong and the low temperature ( environment temperature 5. 0 ) which is harmful to those crop and fruit. with the lowest air temperature ( the daily lowest air temperature ) x1, the lasting days of low temperature x2 and an integrative physical element - - negative accumulated temperature x3 in which the effect of the intense and lasting days of low temperature were considered, the correlation coefficient of those indexes were calculated and analyzed, and the results showed that there are apparent linear correlations among them
在此基礎上,以廣東主要熱帶南亞熱帶作物的生物學下限溫度為依據,從這些作物受寒害的起點溫度(環境溫度5 . 0 )出發,提出了寒害過程的概念,並用寒害過程低溫的強度(逐日最低氣溫) x _ 1 、低溫的持續時間(天數) x _ 2及考慮了低溫的強度和持續時間綜合作用的物理量負積溫x _ 3這3個指標來描述寒害的強度,研究了廣東歷年冬季寒害的變化,分析了這3個指標間的相關系數,結果表明它們之間互相存在顯著的相關關系。The farming can be done almost all year round, which benefits the hibernation of the crops and the growth of the perennial crops
大多數年全年穩定通過0 ,可一年四季進行農業耕作,有利於作物越冬和多年生作物的種植,生長期長,積溫豐富。On the basis of former researchers ' work, the author studies sm on ecs continental shelf according to mathematical simulation technique. firstly, the author simulates marine dynamic field with much precise temperature and salinity data. seconly, the author computes the distribution of concentration of sm and its transport in winter and in summer according to a 3 - d suspended matter model. lastly, the author analyses the transport of suspended matter by sea water dynamic circumstance
本文在前人的工作基礎上,通過數值模擬的方法就懸浮體輸送問題進行了探討。首先,利用精度較高的溫鹽資料模擬了黃、東海的水動力場,再通過一個對流? ?擴散型物質輸送模型模擬了東海陸架上冬季和夏季懸浮體的分佈情況,最後結合水動力就懸浮體輸送進行了分析。分享友人