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针对土壤ＰＨ低于５．５则对草坪产徨危害作用和我国南方土壤在高温多雨气候条件下,呈现酸性或强 的这一特点,对福建省土样进行了分析,结果显示：ＰＨ在５．５以下的土样占供试土样的９０－１００％,酸 昌坪土的石灰改良问题亟待解决。并对酸性草坪土的石灰改良作用及进行了论述。 相似文献
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沿长江以北地区的４月份 ,往往要出现几天风沙天气 ,这一时期 ,正是我地紫云英流蜜期和蜂群采集的高峰期 ,风沙天气的到来无疑会给养蜂生产造成损失。紫云英是我地紧接油菜花期后的一个优良大蜜源 ,但其盛花期又往往被农民翻耕 ,所以利用不了几天 ,再加之紫云英花期雨水较频繁 ,晴天的出现显得尤其重要 ,真可谓 :“一日千金”。但往往在雨后转晴之时 ,忽地一会儿 ,又飘来了漫天黄雾 ,天地变得蒙蒙胧胧 ,这就是风沙天气 ,当地人称之为“下黄沙”。风沙是由北方地区植被被破坏 ,久旱无雨 ,随着南下的干冷空气而被风裹起地面沙尘造成的 ,时间１… 相似文献
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石灰以价格低廉，容易购买，而且没有不良气味，具有消毒力强又无污染的特点成为养蚕生产中最普遍使用的消毒药物。生石灰（石灰块）的化学名称为氧化钙，加入水后生成粉状的熟石灰（氢氧化钙），具有强碱性。 相似文献
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D L Barnes 《African Journal of Range and Forage Science》2013,30(2):30-36
Abstract Yield response of crownvetch (Coronilla varia) cv. Penngift, lucerne (Medicago sativa) cv. CUF 101, white clover (Trifolium repens) Dusi type and Kenya white clover (T. semipilosum) cv. Safari to differential application of lime and superphosphate were determined in a 5 × 4 factorial experiment on a virgin soil of the Griffin form. Lime rates varied from 0 to 7t/ha and phosphate rates from 0 to 150 kg P/ha. Patterns of response differed markedly between legumes. Clover yields were high even in the absence of lime and responses to differential lime rates were negligible. By contrast, yields of crownvetch and lucerne where no lime was applied were very low and yields increased markedly with successive increments of lime, the response of lucerne being greater than that of crownvetch. All the legumes responded to the application of phosphate, but yield increases decreased progressively with increasing phosphate level. Effects of the treatments on soil acidity and extractable nutrient elements were determined. A notable feature was an interactive effect between lime and phosphate on extractable phosphorus (0,25M NaHCO3, pH 8,5). Values increased progressively with successive increments of phosphate application, but decreased with increasing lime application. Depressive effects of lime were greater than at the lower levels of phosphate. 相似文献
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阐述了鲜石灰对漂白粉(Bleaching powder)液释放有效氯的抑制情况;通过试验测得,漂白粉液加鲜石灰有效氯会大大降低;在试验基础上提出:大面积生产中用漂白粉液防病消毒不宜同时加入鲜石灰. 相似文献
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In a pot experiment with the A1 (topsoil) and B2 (subsoil) horizons of a Clovelly soil, it was found that although increasing the rate of band‐placed lime from 265 to 2650 kg per ha did not significantly influence the yield of Ladino clover, considerably higher yields were obtained where the pH of the entire soil mass was raised from approximately pH 5.0 to 6.0 by liming. It is suggested that Al‐toxicity is a major limiting factor in this soil and may largely account for the response to liming. Increasing the band‐placed superphosphate application from 265 to 2650 kg per ha resulted in highly significant yield increases. Considerable root development occurred in the superphosphate bands as compared with limited root development in the lime bands. Significantly higher yields were obtained from the A1 horizon than from the B2 horizon. Differences due to depth of placement of the lime and superphosphate, placement of the lime and superphosphate in a single band as opposed to separate parallel bands, and the use of powdered and granular superphosphate were recorded in the first cut but not in the second. 相似文献
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采用二因素完全随机区组设计,研究在江西省酸性红壤土地上用石灰(A1 1 125 kg/hm2、A2 1 500 kg/hm2、A3 1 875 kg/hm2)和牛粪(B115 000 kg/hm2、B2 22 500 kg/hm2、B3 30 000 kg/hm2)作为基肥对苜蓿Medicago sativa出苗及草产量的影响.结果表明:施用水平提高,对提高苜蓿出苗率有一定效果,但无显著差异;对鲜草产量影响的主导因素是牛粪,随施用量提高,草产量在第1年度无显著差异,而在第2年度差异极显著;施用石灰对青草产量无显著影响;两因素间无互作效应. 相似文献
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椴树是东北林区夏季的主要蜜源。在黑龙江省椴树蜜源场地 ,丰收年份 ,春季出窖的１个标准群 ,养蜂高手可夺得１５０ｋｇ以上的产量 ,有的年份却只能取得几十千克的收成 ,绝产年份又会滴蜜无收。如何掌握椴树的流蜜情况 ,业内人士曾有较详细的论述 ,笔者只是谈一点不同看法作为补充 ,供蜂友们参考。１影响椴树流蜜的主要因素椴树是东北林区高大乔木之一 ,多生长在山间平地土质肥沃之处 ,加之林区具有降雨充沛的自然特点 ,因此 ,上年或当年（５～６月）的旱涝对其流蜜与否影响不太大 ,当年积温多少也不会影响其流蜜大小。经过多年观察 ,我认为… 相似文献
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AIMS: To determine whether the application of lime or nitrogen to pasture affected the spore counts of Pithomyces chartarum.MATERIALS AND METHODS: The lime application studies were undertaken on a spring-calving, pasture-based, commercial dairy farm near Te Awamutu, New Zealand. On 6 November 2012, five randomly selected paddocks were split into three equal sections. In two of the sections, lime was applied at either 1.5 or 2.5?t/ha, and the central section was left as an untreated control. Each section was sampled for spore counting weekly from 16 January to 15 May 2013.Starting in January 2013, five other randomly selected paddocks were monitored for spore counts. On 20 March 2013 the average spore counts in three paddocks were >100,000 spores/g of pasture. These paddocks were then divided into three equal sections and lime was applied as described above. Spore counting in each section continued weekly until 15 May 2013.The nitrogen application study was carried out on three commercial dairy farms near Te Awamutu, New Zealand. Two randomly selected paddocks on each farm were divided into three equal sections and, on 20 December 2012, nitrogen in the form of urea was applied at either 50 or 80?kg urea/ha to two of the sections; the central section remained as an untreated control. Each section was sampled for spore counting weekly from 16 January to 15 May 2013.RESULTS: Following pre-summer lime application, treatment at 1.5 or 2.5?t/ha did not affect spore counts over time compared with the control section (p>0.26). Similarly following autumn lime application, treatment at 1.5 or 2.5?t/ha did not affect spore counts over time compared with the control section (p>0.11). Following nitrogen application median spore counts remained <20,000 spores/g pasture throughout the trial period and there was no effect of treatment on spore counts over time (p>0.49).CONCLUSION: This study found that application of lime before the risk period for facial eczema, in November, application of lime after a spore count rise, in March, or urea application in December did not affect changes in number of spores produced by P. chartarum.CLINICAL RELEVANCE: This study does not support previous suggestions that fertilising pasture with lime or urea could alter the spore counts of P. chartarum. Fertiliser use does not provide an alternative to, or support, conventional methods of facial eczema control such as zinc prophylaxis or treatment of pasture with fungicides. 相似文献
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Lime sulphur is a common topical treatment for dermatophytosis in animals. Until recently, a single veterinary lime sulphur formulation was available. The purpose of this study was to compare the efficacy of eight lime sulphur products for in vitro growth inhibition of Microsporum canis using the isolated infected spore model. Infective M. canis spores were isolated from hairs collected from untreated cats. Hairs were macerated in Triton‐X solution and isolated according to a previously published protocol. Equal volumes of spore suspension and lime sulphur solutions were incubated for 5 min and plated onto modified BBL? Mycosel? agar (Becton, Dickinson and Company; Sparks, MD, USA) plates. Five plates were inoculated for each sample solution. Distilled water and bleach were used as controls. Colony forming units were counted daily for 21 days; positive control plates contained >300 colony forming units/plate. Seven of the products were supplied as concentrates and they were tested at the manufacturer’s recommended dilution, twice label concentration and half label concentration. A prediluted product SulfaDip® (Trask Research, Inc.; Daluca, GA, USA) was tested at the label and half label concentration. All veterinary products formed recommended treatment dilutions of 3% sulphurated lime solution except one (LymDyp®, IVX Animal Health Inc.; St Joseph, MO, USA), which formed a 2.4% sulphurated lime solution. Results of the study showed complete growth inhibition of M. canis spores by all products at all dilutions tested. These results indicate that all tested lime sulphur‐containing products were equivalent. Field studies are needed to test product equivalency in vivo. 相似文献
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稻麦轮作区连续秸秆还田和施肥条件下砂姜黑土无机磷分布特征 总被引：3，自引：0，他引：3
为了揭示秸秆还田与化肥施用对砂姜黑土无机磷的影响,基于实施多年的秸秆还田与施肥定位试验,设置了常规施肥+秸秆全量还田(HN1)、常规施肥量50%+秸秆全量还田(HN4)、不施肥+秸秆全量还田(HN0)、常规施肥+秸秆移除(N1)、常规施肥量50%+秸秆移除(N4)、不施肥+秸秆移除(N0)处理,采用田间取样与室内化验分析相结合的方法研究了土壤不同形态无机磷的剖面分布及累积特点。结果表明,同等化肥施用水平下,秸秆还田较秸秆移除显著提高了土壤Ca2-P和Fe-P的含量,提高幅度最高达219.05%和51.35%,两种形态无机磷占无机磷总量的百分比也显著提高;Ca8-P和Al-P含量整体上有所降低,Ca10-P含量显著降低,无机磷总量有所提高。秸秆还田配施化肥对土壤无机磷的活化效果随化肥施用量的减少和土层深度的增加而降低。秸秆还田不施化肥使土壤Ca2-P、Ca8-P、Al-P和Fe-P含量显著降低。与秸秆移除相比,秸秆还田配施化肥促进了Ca10-P等潜在磷源的转化和分解。Ca-P(Ca2-P、Ca8-P、Ca10-P)和Fe-P所占比例最高,为供试土壤无机磷的主要构成形态。常规施肥条件下秸秆还田促进了土壤速效磷(Olsen-P)含量的快速提升,常规施肥量50%条件下秸秆还田促进了表层土壤Olsen-P的提升,而无肥条件下秸秆还田对土壤Olsen-P含量的提升无明显效果。土壤Ca2-P、Ca8-P、Al-P和Fe-P与土壤Olsen-P的相关性均达到显著或极显著水平,表明4种无机磷与土壤Olsen-P关系密切,可能为土壤有效磷的重要来源。因而,秸秆还田不施化肥会加速土壤无机磷的耗竭,秸秆还田与化肥合理配施,可通过将缓效态无机磷转化为Ca2-P和Fe-P等高活性无机磷,提高土壤供磷能力。 相似文献
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Dermatophytosis is the most common contagious and infectious skin disease of cats. It is of particular importance in animal shelters because it is a known zoonosis, highly contagious, and easily transmitted. In this open clinical trial, 58 cats with confirmed Microsporum canis dermatophytosis and 32 uninfected bonded pairs or littermates were treated with a combination of 21 days of oral itraconazole (10 mg kg(-1)) and twice weekly lime sulphur rinses until cured. Cats were not clipped in this treatment programme. Fungal cultures were obtained once weekly on all cats, and cats were considered cured when they had two consecutive negative weekly fungal cultures. Cats were held in the facility and received continued topical treatment until the fungal cultures were finalized. None of the cats developed oral ulcerations as a result of grooming the lime sulphur rinses. Oral ulcerations only developed in cats with clinical signs associated with upper respiratory disease. None of the uninfected cats living in contact with infected cats became culture positive or developed skin lesions. When data were examined retrospectively and the number of days to finalize the cultures was subtracted (21 days) from the total number of days the cats were housed in the annex, the mean number of days of treatment required for cure was 18.4 +/- 9.5 SEM (range 10-49 days). Cats with more severe infections required longer therapy. In this shelter, the combination of oral itraconazole and topical lime sulphur rinses for the treatment of dermatophytosis was effective and safe. 相似文献
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Chelsea G. Himsworth 《The Canadian veterinary journal. La revue veterinaire canadienne》2008,49(12):1208-1210
Previously, lime (calcium oxide) was recommended by the Canadian Food Inspection Agency (CFIA) as an anthrax disinfectant. However, a recent scientific review of the subject has found evidence to suggest that exposure of anthrax spores to calcium may aid in their survival and viability. For this reason, the CFIA no longer recommends the use of lime for agricultural anthrax disinfection. 相似文献
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Advanced treatment technique for swine wastewater using two agents: Thermally polymerized amorphous silica and hydrated lime for color and phosphorus removal and sulfur for nitrogen removal 
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下载免费PDF全文 The efficacy of advanced treatment of swine wastewater using thermally polymerized, modified amorphous silica and hydrated lime (M‐CSH‐lime) for color and phosphorus removal and sulfur for nitrogen removal was examined with a demonstration‐scale treatment plant. The color removal rate was approximately 78% at M‐CSH‐lime addition rates of > 0.055 wt/v%. The ‐P removal rate exceeded 99.9% with > 0.023 wt/v%. pH of the effluent from the M‐CSH‐lime reactor increased with the addition rate till a maximum value of 12.7, which was effective in disinfection. The recovered M‐CSH‐lime would be suitable as a phosphorus fertilizer because the total P2O5 content was approximately 10%. The nitrogen oxide (NOx‐N) removal rate by sulfur denitrification increased to approximately 80% when the NOx‐N loading rate was around 0.1 kg‐N/ton‐S/day. It was suggested that the combination of the two processes would be effective in the advanced treatment of swine wastewater. 相似文献
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Sandra Newbury Karen A. Moriello Kenneth W. Kwochka Maria Verbrugge Chester Thomas 《Veterinary dermatology》2011,22(1):75-79
In an open non‐randomized study, 90 cats with severe dermatophytosis were treated with 21 days of oral itraconazole at 10 mg/kg and one of three topical antifungal rinses applied twice weekly: lime sulphur (LSO); reformulated lime sulphur with an odour‐masking agent (LSR); or a 0.2% miconazole nitrate and 0.2% chlorhexidine gluconate rinse (MC). Weekly examinations and fungal cultures were used to monitor the cats’ response to therapy. If at day 42 of treatment cats were still strongly fungal culture positive and/or developing new lesions, they were retreated with oral itraconazole and LSO. Cats were not prevented from licking the solutions and none developed oral ulcerations. Thirty‐one cats were treated with LSO, 27 with LSR and 32 with MC. The median number of days to cure was 30 (range 10–69 days) and 34 (range 23–80 days) for LSO and LSR, respectively. Thirty‐two cats were treated with MC, and 13 of 32 cats required repeat treatment because of persistent culture‐positive status and development of new lesions. Median number of days of treatment for the 19 cats that cured with MC was 48 (range 14–93 days). When the number of days to cure was compared between the groups, there was a significant difference between cats treated with LSO and LSR (P = 0.029) and cats treated with LSO and MC (P = 0.031), but no significant difference between the number of days to cure for cats treated with LSR and MC (P = 0.91). 相似文献