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| 1 | Effect of long-term fertilization on soil nitrate distribution显示文摘A thirteen years long term field fertilizer experiment was conducted to monitor the effect of different fertilization on soil nitrate distribution. The results showed: (1) Applying relative excessive N fertilizer could result large quantities of NO - 3 residue and NO - 3 movement downward in soil profiles; amending phosphate fertilizer or organic manure with nitrogen fertilizer together could significantly improve the status of NO - 3 leaching downward due to the balanced uptake of nutrients by crops. (2) Appropriate amounts of nitrogen fertilizer which was equal or smaller than the optimal fertilization rate could not result in more NO - 3 leaching in Northern China. (3) Precipitation influenced the amounts and depth of soil NO\+-\-3 leaching: NO - 3 could move to 80 cm depth or below at autumn or at the next spring when rainfall was higher during the rainy season through July to September in North China. | GUO Li ping *, ZHANG Fu suo, WANG Xing ren, MAO Da ru, CHEN Xin ping (Department of Plant Nutrition, China Agricultural University, Beijing 100094, China. E mail: guolp@ns.ami.ac.cn) | 2001 | Journal of Environmental Sciences2001，13，1： | 3 |
| 2 | Effect of a bacterial inoculum and additive on dry matter in situ degradability of sugarcane silage显示文摘The objective of this study was to evaluate the effect of adding a bacterial inoculum and a handmade additive to sugarcane silage(SCS) on the in situ digestibility of dry matter(DM). The treatments were: T1) sugarcane silage(SCS) and T2) sugarcane silage with 1% inoculum and 1% additive(SCS+). The bacterial inoculum consisted of 10.0% molasses, 1.0% yogurt, 5.0% chicken manure, 0.5% urea, and 83.0% water, and the additive was formulated with 1.0% urea, 0.1% ammonium sulfate, and 0.25% phosphorus. In situ dry matter digestibility(DMD) was determined using the nylon bag technique with four cows equipped with ruminal fistulas. Cows were fed with ensiled sugarcane supplemented with 1 kg of commercial concentrate. 5 g of ground sample for each sugarcane treatment were weighted in nylon bags and incubated for 4, 8, 12, 24, 48, and 72 h in a completely randomized design with six replicates. The DMD(%) was higher(P<0.05) for SCS+ for all incubation times when compared with SCS. There were no differences in ruminal p H between the treatments for all the incubation times. The data suggested that the sugarcane silage with bacterial inoculum and additive could be an alternative for providing forage for ruminants during the season of low growth and quality grass. | José A Reyes-Gutiérrez Oziel D Montaez-Valdez Ramón Rodríguez-Macias Mario Ruíz-López Eduardo Salcedo-Pérez Cándido E Guerra-Medina | 2015 | Journal of Integrative Agriculture2015，14，3： | 3 |
| 3 | Reproductive and Sexual Health of Chinese Migrants显示文摘Objective To investigate the reproductive and sexual health situation,including knowledge,attitudes,and behaviors,among a population-based sample of internal migrant workers in China.Methods A cross-sectional survey of 4 900 rural-to-urban migrants in 6 provinces of China was conducted.Participants completed a 30-min semi-structured questionnaire about contraceptive practices,sexual behavior,and HIV-related knowledge.Results Migrants lacked knowledge of reproductive and sexual health issues.Among those who had heard any sexually transmitted infections(STIs),only 79.1%,46.2%,86.1%,14.5% and 82.2%,respectively,knew that gonorrhea,condyloma,syphilis,chancroid,and AIDS were STIs.About three-quarters of participants had not used any contraceptive method at sexual debut.Among current users of contraceptive methods,85.5% indicated that they were satisfied with the method.Before adoption of a contraceptive method,46.6% of the migrant workers were unaware of the advantages/disadvantages of the method and 75.3% had no knowledge of emergency contraception.Nearly one-quarter(23.4%) reported that they had premarital sex.Among migrants who were sexually active one month prior to the survey,only 14.0% reported that they had used condoms.Conclusion The limited sexual and reproductive health knowledge and unmet reproductive health services of migrant workers in China underscore the need for a comprehensive package of sexual and reproductive health interventions that combine cognitive and behavioral skills training and target both migrants and health care providers. | Jian-fang ZHOU Joanna E Mantell Xiao-mei RU | 2009 | Journal of Reproduction and Contraception2009，20，3： | 2 |
| 4 | A perspective on single molecule SERS: Current status and future challenges 显示文摘 | ETCHEGOIN P G LE Ru E C | 2008 | Physical Chemistry Chemical Physics2008，10，40： | 1 |
| 5 | Episodic rifting and subsidence in the South China Sea显示文摘 | RU K E PIGOTT J D | 1986 | AAPG Bull1986，70，： | 1 |
| 6 | Transforming growth factor - beta - induced epithelial - mesenchymal transition in the lens: a model for cataract formation 显示文摘 | De Iongh RU Wederell E Lovicu FJ | 2005 | Ceils Tissues Organs2005，179，12： | 1 |
| 7 | Postinfeetious bronchiolitis obliterans in children: clinical and radiological profile and prognostic factors 显示文摘 | Yalcin E Do ru D Halilo lu M | 2003 | Respiration2003，70，4： | 1 |
| 8 | Phosphorus levels influence plasma membrane H+-ATPase activity and K+,Ca2+,and Mg2+assimilation in green bean显示文摘 | Salinas R Sánchez E Ruíz J M | 2013 | Communications in Soil Science and Plant Analysis2013，44，： | 1 |
| 9 | Insect stings:clinical features and management显示文摘 | Przybilla B Ru(e)ff F | 2012 | Dtsch Arztebl Int2012，109，13： | 1 |
| 10 | Experimental demonstration of surface selection rules for SERS on flat metallic surfaces 显示文摘 | LE Ru E C MEYER S ARTUR C | 2011 | Chemical Communications2011，47，13： | 1 |
| 11 | Earthworms:sources of antimicrobial and anticancer molecules显示文摘 | COOPER E L RU B WENG N | 2004 | Adv Exp Med Biol2004，，546： | 1 |
| 12 | Hand-assisted laparoscopic colectomy compared with open colectomy in a nonter- tiary care setting 显示文摘 | Osarogiagbon RU Ogbeide O Ogbeide E | 2007 | Clin Colorectal Can- cer2007，6，8： | 1 |
| 13 | Transforming growth factor-beta-induced epinlelial-mesenchymal transition in the lens,a model for cataract formation显示文摘 | De Iongh RU Wederell E Lovicu FJ | | 0，，1： | 1 |
| 14 | Influence of photostability on single-molecule surface enhanced Raman scattering enhancement factors 显示文摘 | ETCHEGOIN P G LACHARMOISE P D LE Ru E C | 2008 | Analytical Chemistry2008，81，2： | 1 |
| 15 | The use of molecularmarkers in the study of genetic diversity in rattan:preliminary results 显示文摘 | Changtragoom S Szmidt A E Wang Xiao ru | 1997 | Genetic resource1997，38，3： | 1 |
| 16 | Transforming growth factor- beta-induced epithelial-mesenchymal transition in the |ens:a model for cataract formation 显示文摘 | de Iongh RU Wederell E Lovicu FJ | 2005 | Cells Tissues Organs2005，179，12： | 1 |
| 17 | Surface enhanced Raman scattering enhancement factors: a comprehensive study显示文摘 | Le Ru E C glackie E Meyer M | 2007 | The Journal of Physi- cal Chemistry C2007，111，13： | 1 |
| 18 | Transforming growth factor- beta-induced epithelial-mesenchymal transition in the lens:a model for cataract formation显示文摘 | de Iongh RU Wederell E Lovieu FJ | 2005 | Cells Tissues Organs2005，179，： | 1 |
| 19 | Discretetimemixing receiver architecture for RF-sampling software-defined - radio 显示文摘 | RU Z Y KLUMPERINK E A M NAUTA B | 2010 | IEEE Journal of Solid - StateC ircuits2010，45，9： | 1 |
| 20 | Production ofplantaricin NC8 by Lactobacillusplantarum NC8 is induced in the presence of different types of gram-positive bacteria显示文摘 | M ALDONADO A RU IZ-BARBA J L JIM (E)NEZ-D(I)AZ R | 2004 | Arch Microbiol2004，181，1： | 1 |
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