查询词典 ammonia nitrogen

Finally, the pH value, lactic acid, water soluble carbohydrate, ammonia nitrogen and cellulose contents were determined for WH silage prepared under the suitable adding doses of lactobacillus and cellulase at day 1, 3, 5, 15, 25, 35 after ensilaging. The pH value decreased from 5.5 before ensiling to 4.3 on the 35th ensiling day, whereas the reverse change tendence was observed for lactic acid content. The cellulose content of silage was lower from 26.5%DM in raw material to 22.3%DM.

结果表明：pH值由青贮前的5.5至青贮第35天时降至稳定的状态，而乳酸含量的变化趋势相反；凤眼莲茎叶纤维素含量从未青贮前的26.5%干物质，至青贮第35天降至22.3%干物质，降低了约4个百分点；青贮料中可溶性碳水化合物的含量随青贮时间的延长而逐渐下降，但是在第5天到第15天的时间段里，可溶性碳水化合物的含量无显著性下降；氨态氮占总氮的比例从青贮第1天的4.61%显著上升至第5天的8.25%，而从第5天开始到第35天，氨态氮占总氮的比例上升的幅度较小。

All additions rapidly decreased silage pH under different DM contents of M.sativa.M.sativa(DM 38.45%) ensiled with lactic acid bacteria+cellulase gave the best results: ammonia nitrogen content was reduced,and most CP was conserved and most lactic acid produced.

结果表明，不同干物质含量的苜蓿青贮时，乳酸菌+纤维素酶的添加均能使青贮pH值快速下降；苜蓿半干青贮(干物质含量为38.45%)可使青贮氨态氮含量显著降低，并保存有较多的粗蛋白质，生成较多乳酸，其中以添加乳酸菌106 cfu/g+纤维素酶0.05 g/kg的青贮效果最好，其青贮综合评定得分最高，达93分。

The change of ammonia nitrogen concn. in the waterbody had no significant difference from that of the control group.

对于水体中氨氮的浓度，罗非鱼的影响则不明显。

Influence factors and rules for adsorption and ion-exchange of ammonia nitrogen by zeolite were analyzed.

分析了氨氮在沸石上发生吸附和离子交换的主要影响因素和规律。

Results indicated that two systems showed good ability to remove COD, LAS and ammonia nitrogen.

结果表明，两个系统对COD、LAS及氨氮的去除均具有良好的处理效果。

The properties of zeolite are studied, as well as the capability of static and dynamic adsorption of organic pollutants and ammonia nitrogen.

研究了沸石的性质以及对有机物、氨氮的静态和动态吸附性能。

Therefore, monitoring data such as DO and ammonia nitrogen can give advance warning of problems.

并以中心城水厂为代表，分析水质在整个水处理流程中的变化规律，找出制约水质达标的环节。

This paper studied the effect of ammonia nitrogen and sulfurated hydrogen on the larvae of penaeus japonicus.

本文主要研究了氨氮和硫化氢对日本对虾幼体的毒性作用。

The key pollution indicators are ammonia nitrogen and ''.

主要污染指标是氨氮和生化需氧量。

Influence factors and rules for adsorption and ion-exchange of ammonia nitrogen by zeolite were analyzed.

水体中的氨氮对人体和水生生物有一定的毒性，其对鱼类的致毒剂量为2.6×10-2mg/L[1]。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失