中度放牧并未使草地牧草产量和红三叶的重要值降低，同时使草地红三叶均质度系数保持在远低于1.0水平以下，但使土壤全氮含量下降0.085%。
Meantime it keeps the coefficient of homogeneity of red clover far below the 1.0 level but causes the total nitrogen content of soil to decrease by 0.085%.
采集了燕山山区20个苹果园富士、国光和金冠等品种的120份叶样，对叶片中氮、磷和钾含量进行了分析。
The Fuji, Ralls and Golden Delicious of apple varieties, 120 samples were collected from 20 orchards in Yanshan mountain area and the leaf n, p, K contents were analyzed.
叶绿素含量与净同化速率间没有显著关系，但与含氮量和比叶重有关。
Chlorophyll content had no significant relation with the net assimilation rate, but was related to the nitrogen content and the specific leaf weight.
下位叶比上位叶对土壤氮的供应状况更为敏感，随着施氮量的增加，水稻叶片氮素含量、叶绿素含量、SPAD值相应的增加，而下位叶的增幅更明显。
Leaf N/ chlorophyll content and SPAD value increased with the increasing N fertilizer, and the lower leaves were more sensitive to the soil N supply than the upper leaves.
提高植株及茎、叶、蕾、铃中氮、磷的含量，对棉花的生长发育，产量及产量构成因素都表现出明显的促进作用。
Test of water nurture indicaded that Zn, Mn promoting action showed raising root activity, chlorophyll content and cotton plant enzyme activity and thus promoted nutrient abso…
氮、镁、锌含量与砧木萌蘖叶内含量几乎没有关系。
The contents of N, Mg and Zn have little or almost no correlation with their contents int…
施用不同的有机肥，对降低烤酒中部叶片硝态氮含量有一定作用，但上部叶的硝态氮含量有所提高。
Nitrate and nitrite contents could be decreased for middle but increased for uppers in flue cured tobacco leaves by applying different organic manures.
土样检测发现正常棉叶田所采土样中全氮、全钾含量比红叶田土样减少34.7%和13.9%。
Content of azote and kalium in the soil of normal field is 34.7% and 13.9% less than in red leaf field.
结果表明：马铃薯叶内及块茎内硝态氮含量在整个生育期里均呈下降趋势，但降低幅度不一致。
The results showed that: the nitrate concentration of potato tubers and leaves showed a downward trend in the whole growth period, but the lower rates is inconsistency.
应用反射仪测定棉株叶组织硝态氮含量，研究了硝态氮作为棉花氮营养诊断和追肥推荐指标的可行性。
Field experiments were conducted to study cotton nitrogen diagnosis and topdressing recommendation by measuring cotton tissue NO 3 - concentration with Reflectoquant .
应用反射仪测定棉株叶组织硝态氮含量，研究了硝态氮作为棉花氮营养诊断和追肥推荐指标的可行性。
Field experiments were conducted to study cotton nitrogen diagnosis and topdressing recommendation by measuring cotton tissue NO 3 - concentration with Reflectoquant .
应用推荐