两系杂交水稻新组合苯两优3113制种技术

根据制种实践,总结了苯两优3113的制种技术：为了获得高产、稳产,苯两优3113在制种方面应选择合适的基地,合理安排播期,合理安排父母本行比,加强肥水管理,适度割叶,严格除杂,搞好人工授粉,抓好病虫防治等。     

清镇市裸苗运输提高烤烟烟苗运输及移栽效率研究（英文）

[目的]解决传统漂盘发苗存在运输效率低,漂盘易损,回收难度大等问题。[方法]进行了裸苗运输研究,以提高烤烟烟苗运输及移栽效率。[结果]裸苗烟框运输运苗的方式,能够有效地降低运输成本,提高烤烟烟苗运输及移栽效率。[结论]裸苗运输适合在大片的专业化移栽区域适用。     

蟹爪兰花粉萌发及贮藏特性（英文）

以蟹爪兰花粉为材料,采用液体培养法研究培养基组成、培养温度、花粉采集方式、贮藏温度等对花粉萌发特性的影响。结果表明:适宜蟹爪兰花粉萌发的液体培养基为:200g/L蔗糖+20 mg/L硼酸+20 mg/L二氯化钙;20℃下蟹爪兰花粉萌发时间比较短,且萌发率较高;有花丝的花粉萌发较好,花粉管生长良好。     

16个水稻品种对乙草胺的敏感性研究

通过测定乙草胺对16个水稻品种苗期生长的影响,研究不同品种水稻对乙草胺的敏感性及其与品种类型之间的关系。培养皿法测定乙草胺对水稻发芽的影响,琼脂法测定乙草胺对各品种水稻苗、根长度及重量等指标的抑制作用。乙草胺对水稻种子发芽有抑制作用;低浓度时乙草胺对水稻的株高、根数有促进作用,当乙草胺浓度达到一定值,则对水稻生长有较强的抑制作用,且对根的抑制作用比对茎的抑制作用更强;供试品种中‘泗稻’耐药性最强,‘天优3301’敏感性最高,0.02 mg/L乙草胺琼脂培养基培养对2个水稻品种的苗长、苗鲜重、根长、株鲜重及根数平均抑制率分别为1.46%、6.42%、51.06%、60.87%和-6.45%（‘泗稻’）;21.62%、22.62%、63.16%、74.76%、3.89%（‘天优3301’）。不同品种水稻对乙草胺的敏感性存在显著差异,且该差异与品种类型相关性不强。     

江苏口岸进境羊毛截获杂草疫情分析与对策

系统分析了2004~2012年江苏口岸进境羊毛中杂草的截获情况,并有针对性地提出了对策。结果表明,共截获38个科、138个属、268个种（属）、13868种次的杂草,其中检疫性杂草3个科、11个属、20个种（属）、2094种次。按照来源国家和地区统计,共从来自19个国家和地区的羊毛中截获杂草,其中以澳大利亚截获杂草种次数最多,占到总截获种次的71.9%。根据以上杂草截获情况分析,建议从风险评估、检疫监管、检疫处理、疫情监测等多方面制定措施,建立防范外来杂草入侵的立体结构。     

Protein and energy utilization of brown,undermilled and milled rices by preschool children

The protein and energy utilization of brown, undermilled and milled rices (variety IR32) were studied in 5–6 preschool children through diets in which 2/3 of N was from rice and 1/3 from casein or milk powder at 200 or 250 mg N/kg body weight. Brown rice was not significantly inferior to milled rice in terms of nitrogen absorption and retention by the children. Its energy and fat contents were, however, less utilized than those of milled rice. Children on the control casein or milk diets showed better apparent nitrogen absorption than those on the rice-based diets but nitrogen retention of all the diets was similar in all three experiments.     

Short communication: Acute toxicity of hydrogen peroxide in juvenile white shrimp Litopenaeus vannamei reared in biofloc technology systems

Biofloc technology (BFT) has been used to rear white shrimp, Litopenaeus vannamei. In this culturing system, the absence of aeration causes a rapid drop in dissolved oxygen levels, and hydrogen peroxide (H₂O₂) can be used as an emergency source of oxygen. This study aimed to determine the lethal concentration and safe level of H₂O₂ applied as a source of oxygen for juvenile white shrimp L. vannamei in a BFT system. Juveniles (1.39 ± 0.37 g) were exposed for 2 h to different concentrations of H₂O₂ [29 (100), 58 (200), 116 (400), 174 (600), 232 (800), 290 (1,000) and 348 (1,200) μL H₂O₂/L (ppm H₂O₂-29 %/L)] in addition to a control group without addition of H₂O₂, and the survival rates were monitored for 96 h. The LC₅₀ values and 95 % confidence intervals at 24, 48, 72 and 96 h were 235.5 (207–268), 199.1 (172–229), 171.1 (146–198) and 143.3 (120–170) μL H₂O₂/L, respectively. The safe level was 14.3 μL H₂O₂/L, and the highest concentration with survival rates similar to the control group (NOAEC) was 29 μL H₂O₂/L. In these concentrations, H₂O₂ can be used as a safe source of oxygen for L. vannamei reared in BFT systems.     

Effects of fish oil replacement by vegetable oil blend on digestive enzymes and tissue histomorphology of European sea bass (<Emphasis Type="Italic">Dicentrarchus labrax</Emphasis>) juveniles

The impact of replacing circa 70 % fish oil (FO) by a vegetable oil (VO) blend (rapeseed, linseed, palm oils; 20:50:30) in diets for European sea bass juveniles (IBW 96 ± 0.8 g) was evaluated in terms of activities of digestive enzymes (amylase, lipase, alkaline phosphatase, trypsin and total alkaline proteases) in the anterior (AI) and posterior (PI) intestine and tissue morphology (pyloric caeca—PC, AI, PI, distal intestine—DI and liver). For that purpose, fish were fed the experimental diets for 36 days and then liver and intestine were sampled at 2, 6 and 24 h after the last meal. Alkaline protease characterization was also done in AI and PI at 6 h post-feeding. Dietary VO promoted higher alkaline phosphatase activity at 2 h post-feeding in the AI and at all sampling points in the PI. Total alkaline protease activity was higher at 6 h post-feeding in the PI of fish fed the FO diet. Identical number of bands was observed in zymograms of alkaline proteases of fish fed both diets. No alterations in the histomorphology of PC, AI, PI or DI were noticed in fish fed the VO diets, while in the liver a tendency towards increased hepatocyte vacuolization due to lipid accumulation was observed. Overall, and with the exception of a higher intestine alkaline phosphatase activity, 70 % FO replacement by a VO blend in diets for European sea bass resulted in no distinctive alterations on the postprandial pattern of digestive enzyme activities and intestine histomorphology.