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叶片营养元素
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  foliar nutrient
     This paper studied that the nutrition characteristics in leaves, mineral element by seasonal change and relativity between foliar nutrient content and fruit quality of fruit-bearing trees on Citrus grand i.s Osbeck cv. Shatianyou.
     研究梅州沙田柚(Citrus grandis Osbeck cv. Shatianyou)结果树叶片营养特点、树体中营养元素的季节性变化及叶片营养元素含量与果实品质的相关性。
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  “叶片营养元素”译为未确定词的双语例句
     The result showed that N,P,K,Ca,Mg,Cu,Fe,and Zn contents of leaves changed evidently with the seasonal change.
     对I-69杨和I-72杨2个杨树无性系人工林叶片营养元素的含量及季节性变化进行了研究,结果表明叶中N、P、K、Ca、Mg、Cu、Fe、Zn的含量随季节的变化而发生显著的变化。
短句来源
     A 30 day stress reduced root and/or stem K +,Ca 2+ and Mg 2+ in P. cv. Italica and P. popularis, but the effect was much less in P. euphratica.
     为期 30d的盐处理降低了群众杨和I 2 1 4杨根和茎组织中K+、Ca2 +、Mg2 +的水平 ,而对于叶片营养元素的水平基本没有影响 .
短句来源
     The results showed that the leaf can be turned green significantly with 30~45 g Fe EDDHA per tree at the stage of bud sprouting, the content of chlorophy and extractable active iron in the leaf has increased by 391.7%~422.9% and 63.7%~71.8% respectively, the fruit quality was increased, the proportion of mineral element in peach leaves also was improved.
     同黄化植株相比 ,叶片叶绿素含量增加 3 91 .7%~ 42 2 .9% ,活性铁含量提高了 63 .7%~ 71 .8% ,果实品质明显提高 ,还改善了叶片营养元素的平衡比例。
短句来源
     Studies on the State of Soil and Leaf Nutrient Element Contents of Plants from Citrus Orchards in the Northwest of Guangxi
     桂西北柑桔园土壤及植株叶片营养元素含量研究
短句来源
     The decreased hybrid vigor of F_2 and F_3 were related with the decreasing of nutrition element contents.
     F2、F3代优势衰退与其叶片营养元素含量减少相符合。
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  相似匹配句对
     OPTIMUM RANGE OF MINERAL ELEMENT CONTENTS IN THE LEAVES OF SWEET ORANGE
     甜橙叶片营养元素适宜含量的研究
短句来源
     STUDY ON CORRELATION BETWEEN CONTENTS OF NUTRIENT IN SWEET ORANGE LEAF AND YIELD
     甜橙叶片营养元素含量与产量的相关性
短句来源
     leaf> leafstalk.
     叶片>叶柄。
短句来源
     leaf>leafstalk.
     叶片>叶柄。
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     Discuss Nutrition Element Magnesium
     浅谈营养元素
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  foliar nutrient
Based on the foliar N: P ratio, we introduced a combination threshold index of N: P ratio with their absolute foliar nutrient concentrations to determine the possible limiting nutrient.
      
Comparison of foliar nutrient concentrations between natural and artificial forests of Pinus sylvestris var.
      
If only considering the foliar nutrient concentrations of P.
      
Hence the effects of the mulch on soil water infiltration and banana foliar nutrient status outweighed the detrimental effects of banana weevil damage.
      
Foliar nutrient dynamics and nutrient use efficiency in Cornus florida
      
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Investigations were made on the leaf N, P, K status in connection with the yields of Citrus unshiu Marc. in Sanming, Jian-ou and Liancheng districts, Fujian Province, from 1976 to 1977. Leaf-samples were collected from the 2nd-3rd nodes of the spring flush of the middle parts of the trees, growing in the red earth of hills, basins and mountains in January, May and September respectively. Preliminary analysis of the data gave the following remarks. 1. N-status of the leaves of satsuma mandarin showed the highest...

Investigations were made on the leaf N, P, K status in connection with the yields of Citrus unshiu Marc. in Sanming, Jian-ou and Liancheng districts, Fujian Province, from 1976 to 1977. Leaf-samples were collected from the 2nd-3rd nodes of the spring flush of the middle parts of the trees, growing in the red earth of hills, basins and mountains in January, May and September respectively. Preliminary analysis of the data gave the following remarks. 1. N-status of the leaves of satsuma mandarin showed the highest in September samples, the next in May (samples) and the least in January(samples). Leaves of the spring flush contained the highest P and K concentration in April-May sampling and the concentration decreased with the increase of leaf-age. 2. Therefore, January sampling from the vegetative terminals of the spring flush of the previous year should be recommended. The status of N, P and K correlated quite well with the yields, while samples of May and September varied with the quantity of flowering and fruiting. 3. The following leaf-analysis criteria for the maximum yields of satsuma mandarin are suggested: N—2.5—2.7%, P—0.16%, K—1.0-1.5%, N/K—1.91—2.80. No correlation was found between the leaf-status of N, P, K in September and the yield of the next year.

本文阐述了温州蜜柑叶片中氮、磷、钾的周年规律性变化;认为花芽形态分化期(一月)叶片营养组分与产量有直接相关;提出了丰产温州蜜柑一月份叶片氮、磷、钾的含量指标。 1、温州蜜柑春梢叶片的营养元素含量,氮素以花芽生理分化期(九月)为最高,幼果期(五月)次之,花芽形态分化期(一月)最低。当年开花结果多时,也有出现九月叶片含氮量低于五月,或五月叶片含氮量低于一月的情况。春梢叶片中含磷、钾量均以四、五月为最高,随着叶今的增加而逐渐降低,至翌年一月~三月为最低,在结果多时,也有出现九月叶片含磷、钾量低于一月的情况。 2、我们认为,温州蜜柑叶片分析的采叶时期以花芽形态分化期(一月)摘取去年春梢营养枝叶片为宜。此时营养组分对当年的产量有明显的正相关。而五月、九月叶片营养含量常因开花结果量多少而波动。 3、温州蜜柑的丰产营养指标,据我们的研究结果,初步认为,花芽形态分化期(一月)叶片含氮量应为2.7%(占干物质重)以上,至少不低于2.5%水平;叶片含磷量应为0.16%以上;叶片含钾量应为1.0~1.5%。氮、钾比率以1.91—2.80为宜。花芽生理分化期(九月)叶片营养含量与翌年产量尚看不出其相关性,但叶片含磷量高有提高翌年座果...

本文阐述了温州蜜柑叶片中氮、磷、钾的周年规律性变化;认为花芽形态分化期(一月)叶片营养组分与产量有直接相关;提出了丰产温州蜜柑一月份叶片氮、磷、钾的含量指标。 1、温州蜜柑春梢叶片的营养元素含量,氮素以花芽生理分化期(九月)为最高,幼果期(五月)次之,花芽形态分化期(一月)最低。当年开花结果多时,也有出现九月叶片含氮量低于五月,或五月叶片含氮量低于一月的情况。春梢叶片中含磷、钾量均以四、五月为最高,随着叶今的增加而逐渐降低,至翌年一月~三月为最低,在结果多时,也有出现九月叶片含磷、钾量低于一月的情况。 2、我们认为,温州蜜柑叶片分析的采叶时期以花芽形态分化期(一月)摘取去年春梢营养枝叶片为宜。此时营养组分对当年的产量有明显的正相关。而五月、九月叶片营养含量常因开花结果量多少而波动。 3、温州蜜柑的丰产营养指标,据我们的研究结果,初步认为,花芽形态分化期(一月)叶片含氮量应为2.7%(占干物质重)以上,至少不低于2.5%水平;叶片含磷量应为0.16%以上;叶片含钾量应为1.0~1.5%。氮、钾比率以1.91—2.80为宜。花芽生理分化期(九月)叶片营养含量与翌年产量尚看不出其相关性,但叶片含磷量高有提高翌年座果率的趋势。

This paper reports on the mineral content in leaves after spraying certain amount of mineral elements during different season and its effects on production. Results have revealed the accelerated matebolism of N and P by K and Ca spraying, and consiquently an increase in output. July is considered the suitable month to collect sample leaves for nutrition diagnosis of mineral elements. Though all the mineral elements like Fe, B, Cu, Zn ect. can be taken in by the leaves, the element which brought distinct increase...

This paper reports on the mineral content in leaves after spraying certain amount of mineral elements during different season and its effects on production. Results have revealed the accelerated matebolism of N and P by K and Ca spraying, and consiquently an increase in output. July is considered the suitable month to collect sample leaves for nutrition diagnosis of mineral elements. Though all the mineral elements like Fe, B, Cu, Zn ect. can be taken in by the leaves, the element which brought distinct increase in output is Fe.

本文报道了不同季节内喷施矿质营养元素后油桐叶片营养元素含量的变化。结果表明:通过喷施钾、钙可以加速氮和磷的新陈代谢,增加油桐产量。七月份是矿质元素营养诊断叶子取样的适宜季节,尽管铁、硼、铜、锌等元素都能被叶子吸收,但能明显促进产量的是铁。

42 kinds of chemical elements in leaf tissue of peach trees in orchards of Gua nzhong plain of Shanxi province were determined by means of analytical techniques such as neutron activation, atomic absorption, flame pnotometric analysis, colorimetric analysis, turbidimetric analysis, and titrimetric analysis.Results obtained from these analysis showed that there had been various changes in the accumulation of different elements , of which, tne contents of the macronutrients sucu as N, P, K, Ca, Mg, S tend to be...

42 kinds of chemical elements in leaf tissue of peach trees in orchards of Gua nzhong plain of Shanxi province were determined by means of analytical techniques such as neutron activation, atomic absorption, flame pnotometric analysis, colorimetric analysis, turbidimetric analysis, and titrimetric analysis.Results obtained from these analysis showed that there had been various changes in the accumulation of different elements , of which, tne contents of the macronutrients sucu as N, P, K, Ca, Mg, S tend to be accumulated much more,comprising about 1-5 percent of dry matter, while those of the micronutrients such as Fe,Mn,Zn, Cu, Mo, B, Cl, Na tend to be accumulated less, being little changable but relatively stable, consisting of 10-400 ppm of dry matter. At the same time , such non-nutritional and poisnous elements as Hg, Cd, Pb, As, Cr, F and rare earth elements can also be identified.Some contents of nutritional ele ments in leaf tissue of cultivated peach trees are close to both the standard value of leaves of peach trees and the determined value of wild peach trees. This indicates that the determined results of contents of different kind of nutritional elements in leaf tissue of peach trees will be of certain im(?)portance in guiding orchard production and environmental protection in that area.

采用中子活化,原子吸收,火焰光度,比色,比浊,滴定等分析方法,测定了陕西省关中地区果园的桃树叶组织内42种化学元素。表明各类元素有不同的积累变化:其中大量营养元素氮、磷、钾、钙、镁、硫的含量累积较多,约占干物质的1~5%;微量营养元素铁、锰、锌、钼、铜、硼、氯、钠的含量累积较少,变化不大,比较稳定,约占干物质的10~40ppm;一些非营养元素汞、镉、铅、砷、铬、氟以及稀土元素等均可检出。各类元素的累积水平随生长条件而有所差异。栽培桃树叶片营养元素含量与桃叶标准值、野生山桃树叶片营养元素含量测定值比较一致。说明桃叶组织内各类元素累积水平的揭示,将对指导该地区果树生产和环境保护起一定作用。

 
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