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upland
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  旱地
    A STUDY ON THE REFORM OF UPLAND FARMING SYSTEM IN TROPICAL MOUNTAINOUS REGION OF SOUTH YUNNAN
    滇南热带山区旱地改制的研究
短句来源
    STUDIES ON THE BIOLOGY AND ITS APPLICATION OF THE CROPPING SYSTEM ON THE UPLAND RED SOIL IN SOUTHEASTERN CHINA Ⅱ A Study on the Microflora and Crop Yield Potential in the Grass planted Sloping Wasteland
    中国东南部红壤旱地种植系统的生物学及其应用研究——Ⅱ.红壤荒坡种草的微生物区系与作物生产潜力的初步研究
短句来源
    STUDIES ON THE BIOLOGY AND APPLICATION OF THE CROPPING SYSTEM ON THE UPLAND RED SOIL IN SOUTHEAST CHINA Ⅴ Studies on the Comprehensive design of planting grass and breeding livestock on the wasteslope of upland red soil
    中国东南部红壤旱地种植系统的生物学及其应用研究——Ⅴ红壤荒坡种草养畜的综合规划研究
短句来源
    Designing for Upland Crops Ecological Engineering
    旱地作物生态工程的设计
短句来源
    Summarizing Experiences in Upland Agriculture and Strengthening Agro-ecological Construction.
    总结旱地农业经验 加强农业生态建设
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    Study on the Feature and Control Technology of Upland Nitrogen Loss
    旱田土壤氮素流失特征及其控制途径研究
短句来源
    N_2O and CH_4 fluxes from typical upland fields in northeast China
    东北典型旱作农田N_2O和CH_4排放通量研究
短句来源
    Soil No of the degradation pattern treatment was the lowest and varied from 34.7 to 39.2mg kg-1,while that of the upland crop pattern treatment was the greatest and varied from 47.8 to 53.9mg kg-1.The statistic results indicated that the significant positive correlation between No,NA,NT,soil organic matter(SOM),active organic matter(AOM),and readily oxidizable organic matter(ROM) was observed.
    经过8年的不同经营管理,退化利用方式土壤氮的矿化势最低,变动在34.7~39.2mg kg-1之间,旱农利用方式土壤氮矿化势最高,变动在47.8~53.9mg kg-1之间,园地利用方式(落叶果、常绿果、茶园)的土壤氮素矿化势在46.2~49.5 mg kg-1之间;
短句来源
    Five QTLs QGt6b,QGt8,QGt11,QGc1,and QPc2,which had relatively high general contribution and no Q × E interactions,were selected to facilitate the upland rice grain quality breeding.
    并筛选到5个主效QTL(QGt6b、QGt8、QGt11、QGc1和QPc2)在抗旱育种中可用于蒸煮和营养各品质性状MAS改良。
短句来源
    Results showed that the total organic P in plough layer of acid upland soil in Hunan Province was 165.5±78.4mg·kg-1, which takes about 23 percent of the contents of total P. In the total contents of organic P forms.
    结果表明:湖南省酸性旱土耕作层有机磷总量为165.3±78.4 mg·kg-1,占土壤全磷含量的23%左右。
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  upland
Sources of Zircons from Cretaceous and Lower Paleogene Terrigenous Sequences of the Southern Koryak Upland and Western Kamchatka
      
Leaf Construction Cost of the Most Abundant Species in an Upland Grassland Area of Northern Greece
      
serotinus serotinus are found more often in upland areas with karst and other erosional forms of relief, whereasE.
      
The method of phene scaling is based on the comparison of phene frequencies in a bog and in adjacent upland populations of pine.
      
Holocene dynamics of forest ecosystems on the upper plateau of the Volga Upland
      
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1.The relative number of microorganisms and microflora in paddy soils is quite different from that in cultivated upland soils and idle field.Among the sporogenous bacteria,Bac. idosus and Bac.megatherium are the predominant species,while Bac.subtilis-mesentericus is comparably less. 2.Penicillium、Aspergillus and other genera of fungi are usually present in paddy soils,and Tuberculina、Emericellopsis and Sporormia(?)are the special genera also frequently occured.Perhaps these fungi have a better adapt ability...

1.The relative number of microorganisms and microflora in paddy soils is quite different from that in cultivated upland soils and idle field.Among the sporogenous bacteria,Bac. idosus and Bac.megatherium are the predominant species,while Bac.subtilis-mesentericus is comparably less. 2.Penicillium、Aspergillus and other genera of fungi are usually present in paddy soils,and Tuberculina、Emericellopsis and Sporormia(?)are the special genera also frequently occured.Perhaps these fungi have a better adapt ability to live under a less aerobic con- dition. 3.The composition of soil microflora varies according to soil fertility.Fertile soils have a relatively high percentage of Penicillium—Asymmetrica,and the rate of ammonifi- cation and cellulose decomposition are much intense than the Monoverticillata series. 4.The distribution and activity of amonifying bacteria in paddy soils have the same intendency as fungi. 5.From the above results it was found that although ecological factors play an important role in soil microflora,improving soil fertility through proper management,yet enable to alter their composition.

1.水稻土中各类微生物数量比例和区系组成与旱地或荒地土壤有较明显时区别。芽孢杆菌中以 Bac.idosus 及 Bac.megatherium 为主,而 Bac.subtilis-mesentericus 等较少,此与水稻土的有机质状态似有一定关系。真菌中除一般土壤中均有的青霉、麯霉等菌外,常见的有 Tuberculina、Emericellopsis 及 Sporormia(?)等特殊种类,它们对低氧环境似有较大的适应性。2.肥沃水稻土中除微生物数量和生化强度较高外,微生物区系与土壤肥力水平似有一定的相关性。肥力高的土壤中不对称组青霉菌合量较高,该组青霉菌的氨化作用及分解纤维素的能力均较强;同时,在肥力高的土壤中具有氢化能力的细菌数量也较肥力低者为多。3.初步结果指出,提高土壤肥力的人为措施具有改变微生物区系的可能性,然而生态地理因素对耕作土壤微生物区系仍有一定的限制作用。

Field experiments concerning the effect of magnesium fertilizers on the growth and yield of soybean,peanut,rice and milk vetch(Astragalus Sinicus)were carried out on some upland and paddy soils derived from red clay and red sandstone in Kiangsi Province. Results revealed that an application of MgSO_4(at a rate of 15Kg Mg/hectare)to up- land soils could increase the yield of soybean and peanut to about 20%.In paddy soils,a better response to magnesium fertilizer was found in milk vetch than in the suc-...

Field experiments concerning the effect of magnesium fertilizers on the growth and yield of soybean,peanut,rice and milk vetch(Astragalus Sinicus)were carried out on some upland and paddy soils derived from red clay and red sandstone in Kiangsi Province. Results revealed that an application of MgSO_4(at a rate of 15Kg Mg/hectare)to up- land soils could increase the yield of soybean and peanut to about 20%.In paddy soils,a better response to magnesium fertilizer was found in milk vetch than in the suc- ceeding rice plants. Pot experiments were made in some important soil derived from various parent ma- terials in the red earth region of South China.In many soils the applications of magne- sium fertilizer markedly improved corn and millet in growth. Continuously planting corns up to 3—4 times in pot culture,the experiments showed that without a further supply of magnesium fertilizer would deprive available soil magne- sium and,consequently,the crops were stunted in growth with an appearance of serious magnesium deficiency. Probably owing to the correction of soil acidity,magnesium carbonate has a better effect on the strong acid soils than do the soluble magnesium salts,which are more effec- tive on the neutral to slightly acid soils.

根据三年来在江西红壤(母质为红色粘土及红砂岩红壤)旱地及水田中对早大豆、花生、早稻、晚稻及紫云英等进行的大田试验和对华中、华南红壤的主要类型进行的室内试验,红壤旱地有效性镁含量较低,豆科作物对镁肥的反应比较显著而稳定。每亩施用 Mg素2斤(用硫酸镁),早大豆、花生等可增产20%左右。增产效果因土壤肥力而不同。在水田中,对紫云英的效果较好,对水稻的效果较低。室内试验表明,在多数土壤上镁肥效果显著,玉米与小米对镁肥反应良好,并且在单独施用氮、磷、钾等化肥的条件下,随着作物种植次数的增加,土壤镁素逐渐耗竭,镁肥的效果愈来愈大。难溶性镁肥在酸性红壤上的效果很好,但在接近中性的红壤旱地上,最好施用速效性镁肥以保证作物苗期的镁素供应。

Paddy soil is an anthropogenic soil developed under the rotation of riceand upland crops with alternate wetting and drying.To compare the amorphous iron and the degree of activation of iron inthe profiles of the various paddy soils of different origin is a part of studieson the genesis and classification of paddy soils.The results indicate that the content of amorphous iron and the degreeof activation of iron in paddy soils are increased in the plowed and plowpanlayers,and decreased in the subsoil layer.Paddy...

Paddy soil is an anthropogenic soil developed under the rotation of riceand upland crops with alternate wetting and drying.To compare the amorphous iron and the degree of activation of iron inthe profiles of the various paddy soils of different origin is a part of studieson the genesis and classification of paddy soils.The results indicate that the content of amorphous iron and the degreeof activation of iron in paddy soils are increased in the plowed and plowpanlayers,and decreased in the subsoil layer.Paddy soils are easily distinguishedfrom their preceding soils by the content of amorphous iron and the degree ofactivation of iron.The different characteristics between the horisons of paddy soils aremainly controlled by their respective forming processes.As mentioned above,the degree of activation of iron is closely connected with the profile develop-ment of the paddy soils.This seems to be a very important point.

水稻土是在母土(起源土壤)上经人工水旱交替耕种形成的土壤类型,土壤粘粒矿物中具有较高活性的、占氧化物中主要地位的氧化铁部分、发生着形态和性质上的变化。本文对两种不同起源的水稻土与相应的起源土壤进行铁的活化对比分析研究。结果说明,土壤无定形态氧化铁的数量和铁的活化度,在水稻土剖面层次间发生了明显的变化和分异,并显示出相似的规律性。

 
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