山区旱地猪—沼—粮（玉米）循环模式的研究与效益评价   总被引：1，自引：1，他引：0       下载免费PDF全文

徐燕  彭方明  霍仕平  邱诗春  张世平 《中国土壤与肥料》2018,(4):159-165

在一块0.66 hm2试验地上,开展了连续7年以沼气为纽带,以猪粪尿、玉米秸秆等农业废弃物资源化利用为核心的猪—沼—粮(玉米)循环模式研究,并进行了效益评估。结果表明,经连续7年实施猪—沼—粮循环转化后,土壤有机质、碱解氮、有效磷和速效钾含量分别提高115.69%、173.97%、151.87%和117.19%;土壤团聚体、田间持水量和总孔隙度分别增加88.06%、60.29%和50.58%,容重降低19.88%;土壤细菌总数、真菌总数、放线菌总数和微生物总数分别增加93.97%、338.10%、71.71%和93.96%;综合经济效益平均每年每公顷土地增加42 473.1元。  相似文献   

Tales retold     

Hull DL 《Science (New York, N.Y.)》1991,252(5008):993-994

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Multiple mucocutaneous lymphosarcoma in a dog          下载免费PDF全文

da Silva Curiel JM  McCaw DL  Turk MA  Schmidt DA 《The Canadian veterinary journal. La revue veterinaire canadienne》1988,29(12):1001-1002

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The Non-Darwinian Revolution. Reinterpreting a Historical Myth. Peter . Bowler. Johns Hopkins University Press, Baltimore, 1988. xii, 238 pp., illus. $27.50     

Hull DL 《Science (New York, N.Y.)》1988,242(4886):1710-1711

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Ectopic ureter in a cat          下载免费PDF全文

Kuzma AB  Holmberg DL 《The Canadian veterinary journal. La revue veterinaire canadienne》1988,29(1):59-61

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Comparison of an enzyme-linked immunospecific assay (ELISA) with the cold complement fixation test for the serodiagnosis of Brucella ovis infection     

Ris DR  Hamel KL  Long DL 《New Zealand veterinary journal》1984,32(1-2):18-20

An enzyme-linked immunospecific assay (ELISA) for the serodiagnosis of Brucella ovis infection in sheep is described and compared with the cold complement fixation (CF) test. ELISA was performed in microtiter plates, using horse-radish peroxidase conjugated to anti-normal sheep serum globulins, and hydrogen peroxide plus o-phenylenediamine as substrate. A heated, cell-free B. ovis extract was used as antigen in both tests. ELISA was easier to perform, distinguished better between positive and negative sera, and did not need heat-inactivated sera.  相似文献   

A nutritional myopathy enzootic in a group of yearling beef cattle          下载免费PDF全文

Smith DL  Palmer SJ  Hulland TJ  McSherry BJ  Blackwell TE 《The Canadian veterinary journal. La revue veterinaire canadienne》1985,26(12):385-386,387-390

Steers and bulls under feedlot conditions and on an apparently adequate ration developed transitory signs of diarrhea and unthriftiness. One animal became recumbent. Sick and clinically normal animals in the group had elevated serum creatine kinase and aspartate aminotransferase enzyme values and degenerative changes in muscle fibers on biopsy. Feed analysis was carried out and the animals were monitored over several weeks by means of muscle biopsy and serum enzyme analysis as well as by postmortem examination at slaughter. Subclinical myopathy was found in several animals and was thought to be related to low vitamin E content in the high moisture corn ration.  相似文献   

Neurophysiology     

Wilson DL 《Science (New York, N.Y.)》1983,220(4598):709-710

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Remembering Reconsidered. Ecological and Traditional Approaches to the Study of Memory. Ulric Neisser and Eugene Winograd, Eds. Cambridge University Press, New York, 1988. x, 390 pp., illus. $44.50. Emory Symposia in Cognition, vol. 2. From a conference, Atlanta, GA, Oct. 1985     

Schacter DL 《Science (New York, N.Y.)》1989,243(4896):1375-1376

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A tour of computers: ideas and information     

Goodstein DL 《Science (New York, N.Y.)》1989,244(4900):90

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