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preliminary thinning中文什么意思

發(fā)音:   用"preliminary thinning"造句
  • 疏伐,撫育伐
  • preliminary:    adj. 1.預(yù)備的；初步的，初級(jí)的。 2.序言性的，緒 ...
  • thinning:    n. 【農(nóng)，園藝】間苗；蔬花，蔬果。
  • preliminary:    adj. 1.預(yù)備的；初步的，初級(jí)的。 2.序言性的，緒言的。 a preliminary examination 初試，預(yù)考〔學(xué)生普通說(shuō)作 prelim〕。 preliminary expenses 開辦費(fèi)。 preliminary hearing 【法律】預(yù)審。 preliminary remarks 前言；開場(chǎng)白。 n. 1.〔常 pl.〕初步，開端；預(yù)備行為[步驟、措施]，準(zhǔn)備。 2.〔sing.〕 入學(xué)初考，預(yù)考。 3.【體育】預(yù)賽；淘汰賽；(主賽前的)次要比賽〔如拳擊〕。 4.〔常 pl.〕正文前的書頁(yè)[內(nèi)容]。 without preliminaries 直截了當(dāng)?shù)?，單刀直入地?adv. 預(yù)先 (＝preliminarily)。 preliminarily adv.
  • advanced thinning:    前期疏伐
  • bed thinning:    煤層變薄
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例句與用法

  1. Mongolica young stand , secondary natural forest , and the mixed forest of larix olgensis and fraxinus mandshurica rupr . . countermeasures for controlling soil degradation were also recommended . the study got following results : ( 1 ) from young stand to mid - age of larix olgensis , with the closure of canopy and the decrease of undergrowth vegetation cover , soil acidity , enzyme activity , total inorganic phosphorus , available k , soil moisture and total porosity decreased significantly ; while soil organic matter content , humus component content , the amount of three main types of microbes , acid phosphatase activity , and bulk density in rhizosphere soil and non - rhizosphere soil increased with the increase of the amount of forest floor litter ; from mid - age stand to near mature stand , with the decrease of stand density and crown cover as well as the restoration of undergrowth vegetation after preliminary thinning , soil organic matter content , fulvic acid , exchangeable acidity , exchangeable aluminium , neutral phosphatase activity , total amount of inorganic phosphorus , the amount of actinomycetes , soil moisture , and total porosity in rhizosphere soil and non - rhizosphere soil apparently increased ; from near matu re stand to mature stand , soil activity acidity , organic matter content , humus component content , available phosphorus , total amount of amino acid , available k , soil enzyme activity , soil moisture , and total porosity in rhizosphere soil and non - rhizosphere soil decreased , but total phosphorus , soil acidity ( in particular , exchangeable aluminium ) , and bulk density increased
    結(jié)果表明： ( 1 )從落葉松幼齡林到中齡林，隨著林冠的郁閉和林下植被蓋度的急劇下降，林地土壤酸度、土壤酶活性、無(wú)機(jī)磷總量、速效鉀、土壤水分含量、總孔隙度呈明顯下降趨勢(shì)，而根際和非根際土壤有機(jī)質(zhì)含量、腐殖質(zhì)各組分含量、三大類微生物數(shù)量、酸性磷酸酶活性和土壤容重隨著凋落物的增加呈明顯上升趨勢(shì)；從中齡林到近熟林，由于撫育間伐，林分密度及郁閉度下降，林下植被蓋度逐步得到恢復(fù)，根際與非根際土壤有機(jī)質(zhì)含量、富里酸、交換性酸、交換性鋁、中性磷酸酶、無(wú)機(jī)磷總量、放線菌數(shù)量、土壤水分含量、總孔隙度呈明顯的上升趨勢(shì)；從近熟林到成熟林，隨著林齡的增大，根際與非根際土壤活性酸、有機(jī)質(zhì)含量、腐殖質(zhì)各組分含量、有效磷含量、氨基酸總量、速效鉀、土壤酶的活性、土壤水分含量和總孔隙度呈下降趨勢(shì)，而根際與非根際土壤全磷含量、土壤酸度(特別是交換性鋁)和容重呈增加趨勢(shì)。

相關(guān)詞匯

        preliminary:    adj. 1.預(yù)備的；初步的，初級(jí)的。 2.序言性的，緒 ...
        thinning:    n. 【農(nóng)，園藝】間苗；蔬花，蔬果。
        preliminary:    adj. 1.預(yù)備的；初步的，初級(jí)的。 2.序言性的，緒言的。 a preliminary examination 初試，預(yù)考〔學(xué)生普通說(shuō)作 prelim〕。 preliminary expenses 開辦費(fèi)。 preliminary hearing 【法律】預(yù)審。 preliminary remarks 前言；開場(chǎng)白。 n. 1.〔常 pl.〕初步，開端；預(yù)備行為[步驟、措施]，準(zhǔn)備。 2.〔sing.〕 入學(xué)初考，預(yù)考。 3.【體育】預(yù)賽；淘汰賽；(主賽前的)次要比賽〔如拳擊〕。 4.〔常 pl.〕正文前的書頁(yè)[內(nèi)容]。 without preliminaries 直截了當(dāng)?shù)兀瑔蔚吨比氲亍?adv. 預(yù)先 (＝preliminarily)。 preliminarily adv.
        advanced thinning:    前期疏伐
        bed thinning:    煤層變薄
        berry thinning:    疏粒
        bit thinning:    修磨鉆頭
        chemical thinning:    化學(xué)疏伐
        cluster thinning:    疏穗
        commercial thinning:    商業(yè)性疏伐
        crown thinning:    樹冠疏伐
        date of thinning:    間苗期
        degree of thinning:    疏伐度
        dilution thinning:    用燃料油稀釋潤(rùn)滑油
        ecological thinning:    生態(tài)疏伐
        excessive thinning:    過(guò)度減薄
        flame thinning:    火焰間苗
        flower thinning:    【園藝】疏花。
        forest thinning:    森林撫育間伐
        free thinning:    自由疏伐
        free-thinning:    自由疏伐
        hand thinning:    人工疏果
        improvement thinning:    撫育性疏伐
        ion thinning:    離子減薄
        lateral thinning:    側(cè)向變薄

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