| 1. | Photo of ammonia nitrogen concentration nh3 - n in the tuen mun river
屯门河tn1的氨氮含量图片 |
| 2. | Photo of total kjeldahl nitrogen concentration in the siu lek yuen nullah tr23l
小沥源明渠tr23l的凯氏氮含量图片 |
| 3. | Study on nitrogen concentration and deposition amount in wet deposition in typical wetland ecosystem of sanjiang plain
三江平原典型湿地系统湿沉降中氮浓度及沉降量初步研究 |
| 4. | Acidity and inorganic nitrogen concentrations in soil solution in short - term response to n addition in subtropical forests
鼎湖山森林土壤渗透水酸度和无机氮含量对模拟氮沉降增加的早期响应 |
| 5. | The exchange of nitrogen between disordering tide and water - sediment interface effected total nitrogen concentration of overlying water
潮流扰动和水-沉积物界面的氮素交换是影响上覆水体tn浓度的主要因素。 |
| 6. | In chapter 1 , the history investigation of gap : n with dilute nitrogen concentration , especially its isoelectronic exciton mechanics and the study background of gapn alloys are briefly introduced
早在二十世纪六十年代， thomas等人就发现在gap : n中，存在一系列尖锐谱线。 |
| 7. | The seasonal change of total nitrogen concentration was controlled by the nitrogen transportation of yangtze runoff and it was a little more in summer and autumn but a little less in spring
Tn浓度季节性变化受长江径流n素输送量的控制，夏、秋两个季节的tn浓度较大，而春季较小。 |
| 8. | The violent disorder of flooding and ebbing resulted in the release of nitrogen in tidal flat sediment and overlying water so that total nitrogen concentration raised rapid on water surface
涨潮初和落潮末潮流对滩面的强烈扰动会导致滩面沉积物及间隙水中氮的释放，造成上覆水体中tn浓度的迅速升高。 |
| 9. | Percent nitrate nitrogen , ammonium nitrogen and total phosphor was not a significantly variable at the different depths . 2 ) vegetation type results in significant difference in nitrate removal . lolium perenne l is most effective on reducing nitrate nitrogen concentration , accounting to 90 % . for total phosphor , natural vegetation is most effective , reaching 61 . 01 %
2 )不同植被缓冲带对铵氮、总磷、硝氮、总氮的去除效果不同，牧杰对氮盐的去除效果最强，特别是对硝氮的吸收达到90 ，对总磷吸收能力在总体上弱于氮元素的吸收能力，在自然植被处达到最高，为61 . 01 。 |
| 10. | However , except nitrate , the nitrogen concentration including nitrite , ammonia , don , pn and tn in spring 1998 were higher than those in autumn 1997 , with the average concentration of 4 . 9714 . 65 , 0 . 67 ? . 20 , 0 . 7210 . 30 , 9 . 2516 . 88 , 7 . 3014 . 42 and 22 . 9 ? 0 . 2 mol / dm3 in autumn , and 4 . 5812 . 39 , 0 . 70 + 0 . 14 , 2 . 2611 . 05 , 9 . 8814 . 92 , 7 . 8816 . 21 and 25 . 318 . 94 mol / dm3 in spring , respectively . the n / p ratio in autumn 1997 was 13 . 217 . 54 in average which a little lower than redfield ratio , nevertheless in spring 1998 the value was as high as 25 . 6113 . 0 , much hi gher than redfield ratio . there shows a clear seasonal variation of phosphorus structure in two seasons , but the nitrogen structure almost unchanged
两个季节海水中磷的结构变化明显，秋季磷主要以pp ( 54 )为主，而春季长江口营养盐、石油烃对海洋生态系统影响及动力学研究主要以po4一p ( 51 % )为主;两季节氮的结构基本一致，溶解氮都以don为主，分别为40 %和39 % :秋季no3一n比例较春季略高( 22 % ) ，而春季nh4一n比例较秋季略高( 9 % ) 。 |
