景观水原位修复的生物激活剂研究

由酵母膏、氨基酸和维生素等组成的生物激活剂,能刺激水体中土著微生物的生长和提高微生物的活性.配制模拟废水研究生物激活剂对微生物生长的刺激作用,在投加生物激活剂后,CODCr、氨氮和磷等的去除都有显著的增加.还对实际景观水样的修复进行了实验研究,结果表明:投加生物激活剂的水样,与空白相比,CODCr去除率增加了27.3%,溶解氧提升21.2%,浊度的去除率增加了23.6%,氨氮的去除率增加了11.5%.生物激活剂原位修复技术具有易于操作、成本低、无二次污染等优点,预期在住宅小区的人工湖、园林池塘等封闭或半封闭的景观水体修复方面,将具有良好的推广应用前景.     

Protein biostimulant foliar uptake modeling: The impact of climatic conditions

Biostimulants are substances which promote plant metabolism and are able to increase yields of various crops. However, their efficiency at field can be affected by climatic conditions. A novel mathematical model based on diffusion transport mechanism is proposed to predict the biostimulant uptake at different climatic conditions. The main input model parameter is experimentally measured effective diffusion coefficient of the biostimulant. The model is applied to a biostimulant prepared from leather waste by enzymatic hydrolysis. Simulations show that climatic conditions have significant impact on biostimulant penetration and should not be neglected in biostimulant application and further research. The suggested model is able to explain observed differences between laboratory and field biostimulant investigations, as well as draw recommendations for protein biostimulant application. The model also shows that the theoretical tools of chemical engineering can be used for optimization of biostimulant performance. © 2011 American Institute of Chemical Engineers AIChE J, 2012     

多自然生态技术对点源污染的感潮河道修复研究

采用生物激活技术、多功能生态浮岛与磁化抑藻曝气技术集成的多自然生态技术对江苏省太仓市樊泾河进行生态修复的现场试验。结果表明生物激活剂对存在点源污染的感潮河道具有较好的修复效果,NH3-N、TP、CODCr和叶绿素α去除率分别达到61.8%、50.4%、31.3%和75.2%以上。多自然生态技术可以发挥不同技术间的协同作用,进一步改善水质并稳定修复效果,强化对藻类的控制,明显提高水体的透明度。     

Enzymatic vegetable extract with bio‐ active components: Influence of fertiliser on the colour and anthocyanins of red grapes

BACKGROUND: The obtention and physicochemical characterization of an enzymatic vegetable extract (EVE) from agroindustrial wastes by a proteolytic extraction is described. The main components of EVE are nitrogen (peptides and free amino acids) and phytohormones (auxins, gibberellins, cytokinins), as functional components. The effect of EVE as fertilizer/biostimulant on several parameters of red grapes, such as colour and anthocyanins, was also evaluated. RESULTS: Its application induced high anthocyanin content with the specific induction of petunidin. Tristimulus colorimetry was applied in order to study the colour of musts. Grape juice with significant and perceptible differences in colour characteristics was obtained using EVE. The colour points were located around redder hues (h_ab) on the (a*b*)‐plane and lightness (L*) was lower. CONCLUSION: The fertilization with biostimulant shows a promising future in the functional plant nutrition linked with an increase in the organoleptic and quality food parameters. Copyright © 2007 Society of Chemical Industry     

生物激活液对景观水体的生物修复

在消化吸收引进生物修复药剂的基础上以农业废弃物秸秆制成的生化黄腐酸为原料,自主研发生物激活液配方,用于受污染的景观水体的生物生态修复.由两种不同含量生化黄腐酸原料分别形成生物激活液Ⅰ型和生物激活液Ⅱ型考察了两种生物激活液对校园青春河等水体的修复效果,结果表明生物激活液Ⅰ型的效果优于Ⅱ型且较为稳定.与引进药剂BO、NC进...     

新业态:生物刺激素生发灿烂——浅议腐植酸生物刺激素的居间调节作用

生物刺激素是传统肥料和农药之间派生的一个门类,具有针对性强、作用面宽、使用量少、经济安全、环境绩效好的特点。面对当前土壤、粮食、生态环境等安全问题,充分发挥生物刺激素的居间作用有着重要的现实意义。腐植酸在生物刺激素家族中最具活力,天然、质优、性情温和,应当充分融合、发挥居间调节作用。     

Leafamine®, a Free Amino Acid-Rich Biostimulant,Promotes Growth Performance of Deficit-Irrigated Lettuce

Water deficit causes substantial yield losses that climate change is going to make even more problematic. Sustainable agricultural practices are increasingly developed to improve plant tolerance to abiotic stresses. One innovative solution amongst others is the integration of plant biostimulants in agriculture. In this work, we investigate for the first time the effects of the biostimulant –Leafamine^®–a protein hydrolysate on greenhouse lettuce (Lactuca sativa L.) grown under well-watered and water-deficit conditions. We examined the physiological and metabolomic water deficit responses of lettuce treated with Leafamine^® (0.585 g/pot) or not. Root application of Leafamine^® increased the shoot fresh biomass of both well-watered (+40%) and deficit-irrigated (+20%) lettuce plants because the projected leaf area increased. Our results also indicate that Leafamine^® application could adjust the nitrogen metabolism by enhancing the total nitrogen content, amino acid (proline) contents and the total protein level in lettuce leaves, irrespective of the water condition. Osmolytes such as soluble sugars and polyols, also increased in Leafamine^®-treated lettuce. Our findings suggest that the protective effect of Leafamine is a widespread change in plant metabolism and could involve ABA, putrescine and raffinose.