Optimization of furrow irrigation system design parameters considering drainage and runoff water quality constraints     

J. Mohan Reddy 《Irrigation Science》1994,15(2-3):123-136

The design problem of furrow irrigation systems considering runoff and drainage water quality was formulated as an optimization problem, with maximization of net benefits as the objective. A power advance function with an empirically derived relationship between the furrow irrigation design variables and relative crop yield were used in the formulation. The generalized geometric programming technique was used to solve for the optimal values for the design variables that maximized the net benefits from a furrow irrigation system. The optimal efficiency for which the system must be designed under a given set of soil, crop, and economic conditions is not known in advance. In the design, the application efficiency was not specified a priori. It was an output from the optimal design. The analysis suggested that it might not be economical to design surface irrigation systems to achieve a high application efficiency that is specified a priori. In the absence of environmental degradation problems from irrigation, it may sometimes be profitable to design surface irrigation systems to operate at less than the standard application efficiency (55%–90%) that is routinely used in the design. Formulation of the design problem as an optimization problem would yield the optimal application efficiency that would maximize the net benefits to the farmer under any given set of conditions.  相似文献   

Host range of Alternaria alternata—a potential fungal biocontrol agents for waterhyacinth in India     

R. Mohan Babu  A. Sajeena  K. Seetharaman  P. Vidhyasekaran  P. Rangasamy  M. Som prakash  A. Senthil Raja  K. R. Biji 《Crop Protection》2002,21(10):321-1085

The host ranges of Alternaria alternata and fungi native to India and pathogen of waterhyacinth (Eichhornia crassipes) were evaluated using 29 plant species (some with several cultivars tested) representing 18 families of economic and ecological importance. The results showed that only waterlettuce (Pistia stratiotes), another common weed in India, was infected by A. alternata. The use of these pathogens in the biological control of waterhyacinth would not be expected to affect plants of economic and ecological importance in India.  相似文献   

Inactivation of bacterial fish pathogens by medium-chain lipid molecules (caprylic acid, monocaprylin and sodium caprylate)     

Anup Kollanoor  Pradeep Vasudevan  Manoj Kumar Mohan Nair  Thomas Hoagland  & Kumar Venkitanarayanan 《Aquaculture Research》2007,38(12):1293-1300

The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of caprylic acid (CA), monocaprylin (MC, monoglyceride ester of CA) and sodium caprylate (SC) on Edwardsiella ictaluri, E. tarda, Streptococcus iniae and Yersinia ruckeri in Mueller Hinton broth (MHB) were investigated. In addition, the bactericidal kinetics of CA and MC on the aforementioned pathogens in MHB, and that of SC in water, were determined. The MIC of CA and SC on E. ictaluri, E. tarda, S. iniae and Y. ruckeri were 7.5 and 50 mM, 7.5 and 50 mM, 10 and 25 mM, and 7.5 and 25 mM respectively. For MC, the MIC was in between 2.5 and 5 mM for all the pathogens. The MBC of CA, MC and SC on E. ictaluri, E. tarda, S. iniae and Y. ruckeri were 10, 5 and 100 mM; 10, 5 and 100 mM; 15, 5 and 75 mM; and 10, 5 and 75 mM respectively. The three lipid molecules exerted a substantial antimicrobial effect on the fish pathogens studied. The results indicate that CA and its derivatives could potentially be used for treating and controlling bacterial fish diseases, but extensive validation studies in fish are needed before recommending their usage.  相似文献   

Effect of dietary vitamin C on the inflammatory response of mrigal, Cirrhinus mrigala (Hamilton), to Freund's complete adjuvant     

K S Sobhana  C V Mohan  & K M Shankar 《Journal of fish diseases》2002,25(3):179-184

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Climate: The Prime Invisible Driver of Global Change     

Mohan K. Wali 《Landscape Ecology》2014,29(2):359-360

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Molecular markers for yellow stem borer Scirpophaga incertulas (Walker) resistance in rice     

A. Selvi  P. Shanmugasundaram  S. Mohan Kumar  J.A.J. Raja 《Euphytica》2002,124(3):371-377

Breeding for yellow stem borer resistance in rice is difficult owing to the complex genetics of the trait and inherent difficulties in screening. Identification of molecular markers linked to the trait would enhance phenotypic evaluation for the trait. An F₂ population was developed using parents contrasting in their reaction to yellow stem borer resistance. Random Amplified Polymorphic DNA (RAPD) analysis,in conjunction with bulked segregant analysis, enabled us to identify four phenotype-specific RAPD markers. The markers C1₃₂₀ and K6₆₉₅ were linked with resistance and AH5₆₆₀ and C4₁₃₀₀ with susceptibility. The markers K6₆₉₅ and AH5₆₆₀ were linked to the gene(s) at distances of 12.8 cM and 14.9 cM, respectively. Scoring of these markers in a set of germplasm confirmed their reproducibility and their association with the trait. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

Expression Profile of Luteinizing Hormone Receptor Gene in Hierarchal Follicles and Regressing Oviduct Tissues of White Leghorn Hens During Moulting     

R Agarwal  KVH Sastry  V Tripathi  R Singh  R Saxena  J Mohan  RP Singh 《Reproduction in domestic animals》2013,48(2):278-283

In the present study, the expression profile of luteinizing hormone receptor (LHR) was investigated in the ovary, magnum and uterus and in hierarchcal follicles (F‐1, F‐2, F‐3 and F‐4) of hens subjected to moulting to establish their involvement in moulting and presence in non‐gonadal tissues. Fifty‐two layers (72 weeks) were subjected to moult for a period of 14 days. Four birds were sacrificed each time on 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12 and 14 days of moulting, and samples (ovary, magnum, uterus and hierarchal follicles) were collected aseptically for the quantitative study by real‐time polymerase chain reaction. The ovary, isthmus, uterus and magnum weight reduced significantly during induced moulting. From the 4 DOM, this reduction was drastic and reached approximately 80% of original weight in the case of ovary, isthmus and magnum and approximately 65% of original weight in the case of uterus on 14 DOM. Ovarian yellow follicles decreased gradually from 1 DOM to 4 DOM, after that no normal yellow follicle was observed in moulted bird. The number of atretic follicles increased gradually during the course of induced moulting, reaching the peak at 5 DOM. The LHR mRNA was detected in non‐gonadal tissues like magnum and uterus. The LHR expression was significantly (p < 0.05) down regulated in ovary, magnum and uterus throughout the treatment. These results indicated that LHR may have a role in reproductive tissue regression during moulting.  相似文献   

Comparison of various deep convolutional neural network models to discriminate apple leaf diseases using transfer learning     

Pradhan  Priyanka  Kumar  Brajesh  Mohan  Shashank 《植物病害和植物保护杂志》2022,129(6):1461-1473

Journal of Plant Diseases and Protection - Plant diseases are the major factor behind production loss in agriculture. The traditional manual methods for disease detection in plants involve expert...  相似文献   

微生物降解四环素类抗生素的研究进展          下载免费PDF全文

王振楠  白默涵  李晓晶  翁莉萍  叶会科 《农业环境科学学报》2022,41(12):2779-2786

随着抗生素在养殖行业使用加剧，施用粪肥导致的抗生素污染问题日趋严重，微生物降解抗生素作为解决这一问题的有效途径受到人们的广泛关注。本文综述了四环素类抗生素（TCs）的降解方法和微生物降解四环素类抗生素的研究现状，并对微生物降解四环素类抗生素的影响因素、降解路径以及其降解的分子机制进行了详细介绍。在此基础上，对微生物降解四环素类抗生素从实验室研究到实际生产应用进行了展望，指出了未来研究关注的重点。本文以期为人们深入认识四环素类抗生素的微生物修复提供参考，同时为四环素类抗生素的污染修复提供思路。  相似文献   

驴乳营养成分研究进展     

李墨翰  刘爱成  赵闪闪  赵慧雯  张娟  宋婉莹  岳喜庆  郑艳 《乳业科学与技术》2022,45(6):42-49

驴乳因其乳清蛋白、乳糖、溶菌酶、不饱和脂肪酸和VC含量较高而酪蛋白及脂肪含量较低的特点，被誉为人乳的理想替代品，同时具有低致敏性、抑菌性和抗癌活性等多种生理功能。本文介绍驴乳的营养成分特点，包括蛋白质、氨基酸、脂肪、矿物质、维生素等，并与人乳、牛乳、水牛乳、羊乳和骆驼乳进行比较，以期为驴乳的综合加工与利用提供参考。  相似文献