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nitrogen rates     
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  施氮量
     The highest nitrogen rates applied were 2g ammonium phosphate plus 12 g urea per 30 kg air dried soil in one box, 50 kg urea and 120 kg ammonium bicarbonate per mu, respectively.
     最高施氮量分别达到(2g磷酸二铵+12g尿素)/30ks土/箱和尿素50kg/亩、碳铵120kg/亩.
短句来源
     As the nitrogen rates of fertilization increased,the kernel yield appeared to incease first and then decline with its peak occurring at 195 kg/hm~2 nitrogen of fertilization.
     籽粒产量随施氮量增加呈先增加后降低的趋势,以施氮195 kg/hm2的处理籽粒产量最高.
短句来源
     The results showed that grain yields increased under medium (225kg/hm2) and high nitrogen rates (300kg/hm2) compared with low nitrogen rate (150kg/hm2).
     结果表明,与低氮处理相比,增加施氮量提高了小麦产量,在225kg/hm2氮水平下,随氮肥后移产量降低;
短句来源
     Effects of nitrogen rates and soil fertility levels on root nitrogen absorption and assimilation and grain protein content of winter wheat
     土壤肥力和施氮量对小麦根系氮同化及子粒蛋白质含量的影响
短句来源
     The ratio of sedimentation value and dry gluten content representing gluten strengthindirectly decrease or change in inverted parabola along with nitrogen rates raising .
     表示面筋强度的参数面筋指数随施氮量增加而降低,间接表示面筋强度的参数沉降值/干面筋比值随施氮量增加而下降或呈抛物线型变化因品种而异。
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  供氮水平
     Influence of Nitrogen Rates on Nitrate Accumulation and Distribution in Peanut
     不同供氮水平对花生硝酸盐累积与分布的影响
  氮素水平
     Effects of Nitrogen Rates on Grain Yield and Protein Content ofWheat and Its Physiological Basis
     氮素水平对小麦籽粒产量和蛋白质含量的影响及其生理基础
短句来源
     Water culture experiment was carried out with winter wheat ( Triticum aestivum) at the tillering stage to study the influence of nitrogen rates on some nitrogenous substances and water content .
     在水培条件下,研究了氮素水平对冬小麦(Triticum aestivum)分蘖期植株含氮化合物及水分含量的影响。 在不同氮素水平供给下,植株叶片、根系硝态氮、可溶性蛋白、铵态氮及叶片叶绿素含量有明显的差异。
短句来源
     The change of canopy spectral reflectance under different cultivars,different growth stages and varied nitrogen rates were investigated by characterizing canopy multispectral and hyperspectral reflectance in wheat.The results showed that the canopy reflectance differed with cultivars,with significant change at near infrared bands.
     为了更好地利用冠层反射光谱特征监测小麦生长及氮素营养状况,以宁麦9号、淮麦20、徐麦26和扬麦10号四个小麦品种为材料,通过田间小区试验,研究了不同小麦品种在不同生育时期和不同氮素水平下冠层反射光谱的变化规律。 结果表明,相同氮素水平下不同小麦品种冠层反射光谱的反射率有差异,且近红外部分差异较明显。
短句来源
     A field experiment was conducted to study the effects of nitrogen rates on wheat grain yield and protein content and its physiological basis.
     在大田高产条件下研究了氮素水平对小麦籽粒产量和蛋白质含量的影响及其生理基础。
短句来源
     NUE in upland rice was significantly higher than that in paddy rice under low nitrogen rate, whereas NUE between upland rice and paddy rice was not significantly different under medium and high nitrogen rates.
     不同类型稻种资源苗期NUE存在显著或极显著差异,且因氮素水平而异:低氮条件下,陆稻NUE显著高于水稻;
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  氮用量
     Effects of nitrogen rates on accumulation and distribution of nutrients and the yield and quality of flue-cured tobacco under drought stress
     干旱胁迫下氮用量对烤烟养分积累与分配及烟叶产量和品质的影响
短句来源
     Effect of Different Nitrogen Rates on Growth and Development, Yield and Quality of Yellow Sun-cured Tobacco
     不同氮用量对晒黄烟生长发育及产量品质的影响
短句来源
     Effects of Nitrogen Rates on Growth, Development, Yield and Quality of Dark Sun-cured Tobacco (in West Hunan)
     氮用量对湘西晒红烟生长发育、产量及品质的影响
短句来源
     The average price and the high class leaf rate were influenced insignificantly by nitrogen rates and density.
     氮用量和密度对均价、上等烟比例影响不显著 .
短句来源
     The results showed that there were greater effects of nitrogen rates and density on plant height,stalk width and leaf size.
     结果表明 :不同的氮用量和密度对伊兹密尔的株高、茎围、节距和叶片大小影响较大 .
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  nitrogen rates
Irrigation increased dry matter and total sugar contents at the two lowest nitrogen rates in 1994, but decreased vitamin C contents in both years.
      
In the rainy conditions of 1993 irrigation did not effect the yield level.On the other hand, in both years, decreased nitrogen rates increased dry matter, vitamin C and dietary fiber contents, and nitrogen had a minor effect on total sugar content.
      
In the dry and warm conditions of 1994 nitrogen × irrigation interaction was clearly observed; irrigation increased yield more at higher nitrogen rates than at lower nitrogen rates.
      
The decreased nitrogen rates reduced yields in both years.
      
The effect of decreased nitrogen rates (90, 60 and 30 kg N/ha) with and without irrigation on celery yield quantity and internal quality were studied in field experiments in 1993 and 1994.
      
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On experiment using one early and one late rice variety fertilized with various amounts of potassium was conducted in pot culture and in the field respectively in 1980. The results obtained were as follows.When the available K of the soil was about 55 ppm, potassium fertilized at 4.5kg/mu had significaent effects on the yield of rice. It brought about an increase in number of total spikelets, the number of ripened grains per head and 1000-grain-weight except the number of effective heads. The increased yield...

On experiment using one early and one late rice variety fertilized with various amounts of potassium was conducted in pot culture and in the field respectively in 1980. The results obtained were as follows.When the available K of the soil was about 55 ppm, potassium fertilized at 4.5kg/mu had significaent effects on the yield of rice. It brought about an increase in number of total spikelets, the number of ripened grains per head and 1000-grain-weight except the number of effective heads. The increased yield ranged from 9.8 to 12.8 percent in the field trial.By the application of K-fertilizer, photosynthesis of the leaf blade of the rice plant was promoted, more carbohydrates were synthesised and transported to the heads faster, resulting in more carbohydrates being stored in grains during the ripening stage. Potassium fertilization resulted in the increase of the potassium contents, of the potasium to nitrogen rate and reduction in the contents of nitrogen and phosphorus in the different organs of the rice plant. Meantime the nutrition status in the rice plant was reflected by the specific value of potassium to nitrogen which could be used as a parameter of the fertilizing tcchology. In addition, the relationship between the yield component of paddy rice and the potassium content in the leaf blade of the rice plant was expounded by correlation analysis and suggestion for range the normal potassium content in the leaf blade of the rice plant at different growth stage was made.

作者于1980年用早稻广陆矮4号和晚稻汕优6号分别以不同施钾量进行盆栽和大田试验。结果表明,亩施纯钾9斤即对水稻产量构成因素和产量有显著的促进作用,大田增产幅度为9.8—12.8%。施钾能促进稻株进行光合作用,合成较多的碳水化合物,并能促进碳水化合物转运和在谷粒中积累。施钾能使稻株不同部位的钾含量(干重%)提高,氮磷含量相对下降,钾氮比值也提高。钾氮比值的大小能反映稻株的营养状况,可作为施肥技术的一个参数。 本文通过水稻产量构成因素与主要生育时期稻株叶片钾含量之间的相关分析,初步阐明了它们之间的关系,并提出不同生育时期稻株叶片中正常钾的含量范围。

An increase on yield of soybean obtained by different rate of nitrogen application on lessive soils in the eastern part of our province was from 4.4% to 18.42% in average. The optium rate of nitrogen application was N3 which promoted the growth of soybean from the expanding of the first compound leaf to pod filling.Nitrogen rate waa closely related with growth of roots which was promoted with lower rate of nitrogen and inhibited with higher rate of nitrogena pplication....

An increase on yield of soybean obtained by different rate of nitrogen application on lessive soils in the eastern part of our province was from 4.4% to 18.42% in average. The optium rate of nitrogen application was N3 which promoted the growth of soybean from the expanding of the first compound leaf to pod filling.Nitrogen rate waa closely related with growth of roots which was promoted with lower rate of nitrogen and inhibited with higher rate of nitrogena pplication. Changes of nitrogen rate influenced weight of nodules significantly, and the curveof relationship betweethem appeared as parabolic. Its quadraticp olynomial equa-tion was y=5.98+0.41n-0.05x2. The effect of nitrogen rate on nitrogenase was higher than on weight of nodules, the increase of the former was 61.25%, while that of the latter was only 24.20%.

本试验通过三年多点田间试验,研究了大豆施氮肥的增产效果。结果表明,不论高量或低量均有增产,但N_3增产最多、最稳、效益最好。施氮肥对地上部(株高、鲜重、叶面积系数等)生长有良好的促进作用,而氮用量、地上部生长量和产量之间无明显回归关系。氮肥对根部生长影响显著。施氮肥使根瘤量平均减少24.2%,使固氮酶活性平均降低61.25%。

Stainless steel was smelted with plasma arc torch. The main factors which affect the content of nitrogen alloying in the steel under plasma are investigated. The results show that increasing the nitrogen rate as plasma arc gas, higher stirring intensity and longer alloying time, the nitrogen content in steel is also increased.

应用等离子氮弧冶炼不锈钢,研究了影响钢中氮合金元素的主要因素。主要研究等离子氮气流量、钢液搅拌强度、精炼时间等因素影响钢液增氮的规律。提高等离子氮流量、增强搅拌、延长精炼时间,钢中含氮量增加。

 
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