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交换性钾
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  exchangeable potassium
     Soil culture results showed soil exchangeable potassium, calcium and magnesium content had increased significantly after different combined applications of potassium, calcium and magnesium fertilizer were applied.
     土壤培育试验结果表明,不同配比的钾、钙、镁肥加入土壤后,土壤交换性钾、钙、镁的含量明显提高,并随培育时间的延长,土壤交换性钾、镁的含量表现出先上升后下降的规律,土壤交换性钙含量则表现为先下降而后又有所上升的规律。
短句来源
     The following findings indicate that the order of the correlation degree of vari-ous soil untrient and physical clay is CEC > exchangeable potassium > total potassium > totalnitrogen > organic matter > available phosphate > total phosphate.
     结果发现,各土壤养分与物理性粘粒含量相关程度的顺序为:阳离子交换量(CEC)>交换性钾>全钾>全氮>有机质>速效磷>全磷
短句来源
     The characteristics of potassium exchange in three groups of cultivated soils with different clay mineral composition were studied. The results showed that the potassium exchange selectivity coefficients of the soils(K_G)were significantly negatively correlated with exchangeable potassium ratio (EPR) (r=0.86~-0.95), and leveled off with the increasing, in EPRd.
     本文研究了三组不同粘土矿物组成的耕作土壤钾素的交换特性,结果表明,供试土壤的钾交换选择性系数(K_c)与交换性钾比率(EPR)呈极显著的负相关,相关系数变化于-0.86至-0.95之间,且K_c因EPR的增加而趋于恒值。
短句来源
     The soil potassium exchange selectivity varied with the clay mineral composition, clay content and initial saturation percentage of exchangeable potassium and showed the following order: the first group of soil>the second group of soil>the third group of soil.
     土壤钾交换选择性的强弱因粘土矿物组成、粘粒含量和初始交换性钾饱和度的不同而表现出如下趋势:第一组土壤>第二组土壤>第三组土壤。
短句来源
     Soil exchangeable potassium was higher than that of CK treatment at first, which was lower than that of CK treatment after 90 days yet in soil culture.
     土壤交换性钾含量在培育初期高于对照处理的,但在培育至第90天则低于对照处理的,土壤交换性镁的含量比对照处理的低。
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  exchangeable k
     The exchangeable K and non-exchangeable K increase in the sequence as J3P> J3S>J2S>K1C and K1C >J3P> J2S> J3S respectively, whereas mineral K decrease in the sequence as J3P> J3S >K1C >J2S.
     交换性钾、非交换性钾增加顺序分别为 :J3P >J3S >J2 S >K1 C及K1 C >J3P >J2 S >J3S ; 结构钾降低的顺序为 :J3P >J3S >K1 C >J2 S。
短句来源
     In addition,alkalizable N,available P,exchangeable K and Mg in soil treated with magnesium compound fertilizer II were increased by 94.9%,46.5%,31.1% and 35.3% as compared with the control.
     其中施用镁肥II处理土壤碱解氮、速效磷、交换性钾及交换性镁含量分别比对照提高94.9%、46.5%、31.1%和35.3%。
短句来源
     3)—△K° significantly correlated with soil ex(?) ble K, but that of limestone soil and p urple soil with 2∶1 type clay mineral were higher than exchangeable K, therefore 1 tool L~(-1) NH_4OAc might overestimate soil exchangeable K 1ecel.
     (3)—△K°与土壤交换性钾呈极显著正相关(r=0.7870),但是具有一定含量的2:1型粘粒矿物的石灰土和紫色土,其—△K°明显低于交换性钾量,因此,lmol L~(-1)中性NH_4OAc可能会过高地估计土壤的交换性钾
短句来源
     (3)The BPK and PBCK do not correlate with the level of exchangeable K of the soil.
     (3)BP~k和PBC~k与土壤交换性钾临界水平的相关性不密切。
短句来源
     The better extracting method and kinetic model for describing the release and rate of soil non exchangeable K were discussed with Elovich, Second order kinetic models by 0 50 mol· L -1 HNO 3, 0 01 mol·L -1 oxalic acid and H resin successive extraction under constant temperature and pot exhaustion of ryegrass.
     采用Ca2 + 饱和土壤的 0 50mol·L- 1硝酸、0 0 1mol·L- 1草酸和氢质阳离子交换树脂恒温连续提取法 ,利用Elovich和二级动力学模型 ,结合生物吸钾试验 ,研究探讨了描述土壤非交换性钾释放及其速率较为理想的连续提取法及其动力学模型。
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  “交换性钾”译为未确定词的双语例句
     The total K contents of the cultivated Brown earth in Liaoning Province range from 0.69% to 2.18%. The amount of rapidly available K, slowly available K and easily release non-exchangeable K are 85.5-24.7.5ppm, 177.5-1227.5ppm and 237.5-1752.5ppm, respectively.
     研究了辽宁省七种主要成土母质发育的耕地棕壤一些供钾潜力指标:土壤全钾含量、速效钾含量、缓效钾含量和易释放非交换性钾含量分别为0.69%-2.18%、85.0-247.5ppm、177.5-1227.5ppm和237.5-1752.5ppm;
短句来源
     The amount ot K absorbed by winter wheat was most from the non-exchangeable K of the soil that can not be extracted with 1mol/L hot HNO3 was the largest.
     冬小麦吸收的钾主要来自于1mol/L热HNO3不能提取的非交换性钾
短句来源
     Soil Potassium is usually divided into water soluble.
     土壤钾按其存在形态分为水溶性钾、交换性钾、非交换性钾和矿物态钾,而交换性钾又可进一步分为表面吸附的钾和特殊吸附的钾。
短句来源
     Results indicated that the total K in the tested purple paddy soils was low to medium ranged from 1 29% to 2 62%, and mineral K accounted for 96 82% while quickly availble K and slowly available K only accounted for 0 62% and 2 56%, respectively on average. The potassium supplying power of the tested soils showed the following order neutral purple paddy soil>calcareous purple paddy soil>acid purple paddy soil.
     结果表明 ,4个紫色水稻土供钾能力均属中下水平 ,全钾含量为 1 2 9%~ 2 62 % ,其中矿物钾量平均占 96 82 % ,速效钾和非交换性钾仅平均占 0 62 %和 2 56% ,土壤供钾能力以中性紫色水稻土 >石灰性紫色水稻土 >酸性紫色水稻土。
短句来源
     (2) The amount of 1 mol/L HNO_3-extractable K was unsuitable to evaluate soils exhausted as it was higher than that pre-exhausting and had no correlation or negative correlation with the amount K uptake by rice.
     (2)1mol/L沸HNO3法提取的非交换性钾含量在耗竭后高于耗竭前的水平,与水稻吸钾量相关性很小或呈负相关,不适宜用来评价耗竭土壤。
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  exchangeable potassium
As the plant is approached, the contents of exchangeable potassium and acidity proved to decrease, whereas the contents of nickel and copper increased by two orders of magnitude and reached one-quarter of the total cation exchange capacity.
      
The contents of nonexchangeable, exchangeable, and easily exchangeable potassium and the K+ activity in 1: 2.5 water suspensions were measured in the original samples and after the end of the experiment.
      
The results were in agreement with previously published investigations of "exchangeable potassium" after similar treatments.
      
Whole-body and exchangeable potassium measurements in normal elderly subjects
      
The effect of pig slurry on exchangeable potassium in calcareous soils
      
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  exchangeable k
Stepwise regression analysis revealed that root growth during the early stages is generally influenced by properties such as soil moisture, and contents of sand, organic carbon, available N, exchangeable K and exchangeable Ca.
      
The exchangeable K was more tightly held on the exchange sites than were Ca, Mg, or Na, thus reducing the high Na effects.
      
Coarse pumice had a higher initial pH and less total N, less exchangeable K, Ca, and Mg, and less extractable B and S than finer textured layers.
      
Aliquots of moist soil were analyzed for exchangeable K by leaching with neutral molar ammonium acetate at 1:50 soil solution ratio.
      
Extraction with boiling 1 M nitric acid at 1:100 soil solution ratio for 20 min was used to determine available non-exchangeable K.
      
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From the determination of exchangeable and non-exchangeable potassium ofthe different soils in Jiangsu Province and the experiments of potash fertilizationon cotton,it was preliminarily established that bleached whitish soils in ChenjiangDistrict,the sandy and sandy loom soils along the Yangtze River and the sandysoils in Xuzhow-Huaiying District are deficient in available potassium(exchange-able K 10—20 jin/mu,non-exchangeable K 65—200 jin/mu),the K supply ofthe permeable paddy soils in Suzhow Distriet is also...

From the determination of exchangeable and non-exchangeable potassium ofthe different soils in Jiangsu Province and the experiments of potash fertilizationon cotton,it was preliminarily established that bleached whitish soils in ChenjiangDistrict,the sandy and sandy loom soils along the Yangtze River and the sandysoils in Xuzhow-Huaiying District are deficient in available potassium(exchange-able K 10—20 jin/mu,non-exchangeable K 65—200 jin/mu),the K supply ofthe permeable paddy soils in Suzhow Distriet is also low(exchangeable K 18—24jin/mu,non-exchangeable K 60—80 jin/mu),and the soils in The Lower RiverBasin and along the coast line are rich in K supply(exchangeable K 40—70 jin/mu,non-exchangeable K 200—300 jin/mu).The results from the cotton potash fertilizaton during 1973—75 had shownthat when the amounts of exchangeable K were less than 25 jin per mu,theapplication of potash fertilizer had a marked eliect in increasing cotton yield.Potash fertilization lessened the wilting disease and prevented the prematurity.Potash fertilization lessened the root diseases during the seedling stage toensure the stand in the field.Potash fertilization increased the boll wight,promoted boll opening and im-proved the fibre quality.The diagnostic technique of potassium on cotton during the square stage wasa very useful tool to decide whether the potash fertilizer should be side-dressed.

根据我们对我省不同土壤交换性钾和非交换性钾的测定以及棉花的钾肥试验,初步确定我省白土类型土壤,沿江沙土和沙壤土,徐淮地区沙土为缺钾土壤(交换性钾含量10—20斤/亩,非交换性钾65—200斤/亩),苏州地区黄泥土钾的供应也不充足(交换性钾18—24斤/亩,非交换性钾60—80斤/亩),里下河地区湖积物发育的土壤和滨海地区土壤钾的供应丰富(交换性钾40—70斤/亩)非交换性钾200—300斤/亩)。三年棉花钾肥试验指出,当土壤交换性钾含量低于25斤/亩时,施用钾肥有显著增产效果。土壤含钾水平愈低,钾肥增产效果愈显著。钾肥能减轻红叶茎枯病,防止早衰。钾肥能减轻苗期病害,保证壮苗全苗。钾肥能增加铃重,促使棉铃吐絮畅,棉花品质好。蕾期田间棉株钾素营养诊断,可作为棉花追施钾肥的参考。

In this paper, pot and field experiments with the graminaceous crop-rice as the indicator crop were carried out by using chemical methods and electroultra-filtration technique to study the relationship between the uptake of potassium by rice and potassium status of the different soils. Author′s preliminary experiment results have already proved that nonexchangeble potassium (slowly available potassium)is the main source of K taken up by rice. According to the uptake characteristic of potassium by barley and...

In this paper, pot and field experiments with the graminaceous crop-rice as the indicator crop were carried out by using chemical methods and electroultra-filtration technique to study the relationship between the uptake of potassium by rice and potassium status of the different soils. Author′s preliminary experiment results have already proved that nonexchangeble potassium (slowly available potassium)is the main source of K taken up by rice. According to the uptake characteristic of potassium by barley and rice, we have already suggested that extraction with cold 2N HNO_3 solution can beused as a rapid method for determining available potassium for the paddy soils. It is a simple and convenient method. This study indicates that when cold 2N HNO_3 extractable potassium in the paddy soil is less than in 10-12mgK/100g soil it can be considered soil deficient in available K.

本文以禾谷类作物(水稻)为对象进行盆栽和田间试验,用化学方法和电超滤法研究土壤供钾状况与水稻吸钾间的关系。作者初步试验结果已证明,非交换性钾(即缓效性钾)是水稻钾素的主要给源,根据禾谷类作物(稻、麦)的吸钾特点,我们提出用冷的2N HNO_2溶液提取法有可能作为测定水稻土有效钾的快速而简便的方法。本研究证明水稻土有效钾量小于10—12mgk/100克土为缺钾土壤。

Eleven representative arable soils with widely different property in Zhe-jiang province have been studied for their K buffering power(BPK)as well as potential buffering capacity(BPCK),and the correlation between BPK and BPCK and the critical level of soil K by the method of exhausting experiment with rye plant.The major results of this study are as follows.(1)BPK and PBCK of the soils under study are significantly positively correlated,with r= 0.94.The correlation is mainly dependent upon the type of silicate...

Eleven representative arable soils with widely different property in Zhe-jiang province have been studied for their K buffering power(BPK)as well as potential buffering capacity(BPCK),and the correlation between BPK and BPCK and the critical level of soil K by the method of exhausting experiment with rye plant.The major results of this study are as follows.(1)BPK and PBCK of the soils under study are significantly positively correlated,with r= 0.94.The correlation is mainly dependent upon the type of silicate clay minerals.(2)BPK and PBCK are negatively correlated with the critical level of K in soil solution.The higher the BPK and PBCK,the lower the critical level of K in soil solution would be,and vice,versa.(3)The BPK and PBCK do not correlate with the level of exchangeable K of the soil.Therefore,the critical level of K in soil solution may be used as a better index that than of exchangeable K of the soil.

测定了浙江省11个理化性质差异较大的土壤样品的钾缓冲力(BP~k)和钾位缓冲容量(PBc~k)。并通过黑麦草耗钾试验。分析土壤BP~k、PBC~k和土壤钾临界水平的相关性。研究结果表明:(1)土壤的BP~k和PBCc~k呈显著正相关,r=0.94~(**)。其相关性主要决定于粘粒矿物的类型。(2)BP~k和PBC~k与土壤溶液钾临界水平里负相关。BP~k和PBC~k大的土壤,溶液钾的临界水平低。反之亦然。(3)BP~k和PBC~k与土壤交换性钾临界水平的相关性不密切。说明用土壤溶液钾作为有效钾的指标比用交换钾更可靠。

 
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