氨态氮

The phytoplankton identified from the trial ponds belongs 40 gena, 7 phyla.

试验前后稻田中的氨态氮(0.36mg/L-0.56mg/L)和硝态氮(0.4mg/L-0.8mg/L)变化不大。

The research results indicated that the automatic Kjeldahl apparatus method was an accurate and reliable method for determination of ammoniacal nitrogen in silage.

研究结果证明，自动凯氏定氮仪法是一种准确可靠的青贮饲料中氨态氮检测方法。

Furthermore, the effect of different carbon and nitrogen sources on phosphate solubilization of TK-46 was investigated.

结果］结果表明，碳源对转化子解磷能力影响较小，而氮源的作用较大，其中转化子在解磷过程中最适氮源是氨态氮。

The combined application of strains ZW38 and ZL5 could effectively degrade the ammoniacal nitrogen in marineculture wastewater into the gaseous nitrogen with the poisonless and harmless in the environment.

结论］将ZW38和ZL5联合应用可以有效地将海水养殖废水中的氨态氮降解成为对环境无毒无害的气态氮。

Effects of ordinary silage and mixed silage on the Robinia pseudoacacia, Caragana and Amorpha fruticosa silage were studied by observing color, odor, texture, pH, organic acid composition and content, ammonia-N / total-N ratio, crude protein, neutral detergent fiber, acid detergent fiber and comparing their nutritive value before and after silaging. Results showed that silage quality of R.

对刺槐、柠条和紫穗槐进行了单独青贮和两两混合青贮，并从青贮饲料的色泽、气味、质地等感官品质，pH值、有机酸含量及组成、氨态氮／总氮比值这些发酵品质，以及粗蛋白、中性洗涤纤维和酸性洗涤纤维这些营养价值方面进行了分析评定。

As an extension to the "973" Program of National Planning key basic research project -----the study of China lake nutrient over-enrichment process and the mechanism of blue alga outbreak, this paper introduces our experiments as below:(1) Experiment on heavy metal absorption and disorption abilities of Ceratophyllum demersum , Hydrilla verticillata and Myriophyllum triphyllum, in order to campare their absorption capability .

本文在前人的研究基础上，依托国家&973&国家重点基础研究规划项目&湖泊富营养化过程与蓝藻水华暴发机理&，开展了下列工作： 1、选取狐尾藻、金鱼藻、黑藻三种大型沉水植物作为研究对象，通过对重金属离子铜离子的吸附及解吸实验，比较其三种沉水植物之间吸附能力的大小； 2、选取狐尾藻、黑藻为研究对象，研究了重金属离子铜离子对沉水植物的胁迫作用及铜离子在植物体内的富集情况； 3、选取黑藻为研究对象，研究了沉水植物在富营养条件下不同浓度的氨态氮和硝态氮对沉水植物的生理生长的影响。

The results indicated that COD,the contents of suspension,ammoniated nitrogen and nitrated nitrogen were much lower than those of mono...

结果表明，循环水养殖系统内虾池水层悬浮物数量、COD值、氨态氮和硝酸态氮含量比对照组对虾单养池明显降低(P·01)。

Firstly, the dissertation chose the species of additives and decided the concentrations of addition. Then experiments had been carried out by using corn stover ensiled with those additives under ideal ensiling condition. After each storage and fermentation period, silage was removed from silo tin and analyzed for DM, pH, DM digestibility, NDF digestibility, organic acid composition and content, DM Recovery, silage composition, ammonia-N-to-total-N ratios of silage. Those results had been used to evaluate the effects of those additives on corn stover silage.

课题首先根据查阅的大量文献资料，确定要研究的添加剂种类和添加剂量，然后在玉米秸秆原料中添加所选的添加剂，在适宜的青贮条件下进行青贮饲料的调制试验，将经过一定发酵时间的青贮饲料开封后，通过测定玉米秸秆青贮饲料的干物率、pH值、有机酸含量及组成、干物质消失率、NDF瘤胃降解率、干物质回收率、青贮化学成分、氨态氮占总氮的比例等指标，这些测定分析结果用来确定不同添加剂对玉米秸秆青贮饲料质量的影响。

The results show that the BST is a nice nitrogenous fertilizer resources and to some extents,equal and superior to traditional nitrogenous fertilizer urea and sulphuric acid ammonia.

结果表明，BST是很好的氮肥资源，等同于或某种程度上优于尿素和硫酸铵。对土壤的理化性质、氨态氮、硝态氮含量以及对作物吸收Ca，Mg，K等养分和生长发育的影响与常规氮肥相似。

Pseudoacacia and Caragana were significantly (P.05) better than A. fruticosa in pH, lactate content and ammonia-N/total-N ratio, so that their fermentation quality was better. In addition, they were high in crude protein and low in neutral detergent fiber and acid detergent fiber, showing that they were abundant in nutritive components. A. fruticosa was the inferior silage in every evaluation in the experiment. The mixed silage of R. pseudoacacia and Caragana was the best, and the mixed silage with A. fruticosa was not recommendable. There were no obvious changes in the time before and after silaging in nutritive value of these three kinds of plants, it showed that the silage technology was good.

结果表明：刺槐、柠条青贮伺料在pH值、乳酸含量、氨态氮／总氮比值方面均显著地(P.05)好于紫穗槐处理，发酵品质良好，且粗蛋白含量高，中性洗涤纤维和酸性洗涤纤维含量低，营养价值高；而紫穗槐青贮品质在各项评定中均较差；在混合青贮中刺槐和柠条青贮混合品质最佳，与紫穗槐混合的两种混合饲料品质较差；刺槐、柠条、紫穗槐在青贮前后营养品质均无明显降低，青贮饲料品质等级均为良好，青贮效果较优。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。