致作者

?A g r i c u l t u r a l B i o t e c h n o l o g y?(中文译名《农业生物技术》)是由美国国会图书馆主管,美国Wu Chu(USA-China)Science and Culture Media Corporation?中文译名:吴楚(美中)科技文化传媒公司】主办的全英文期刊,ISSN刊号:2164-4993,暂为双月刊,刊物内容包括与农业科学相关的植物、动物、微生物及林业、海洋等学科在组织、器官、细胞、染色体、蛋白质、基因、酶、发酵工程等不同水平上的农业     

Phosphorus accumulation and leaching risk of greenhouse vegetable soils in Southeast China

Over-fertilization has caused significant phosphorus(P) accumulation in Chinese greenhouse vegetable production(GVP) soils. This study, for the first time, quantified profile P accumulation directly from soil P measurements, as well as subsoil P immobilization, in three alkaline coarse-textured GVP soil profiles with 5(S5), 15(S15), and 30(S30) years of cultivation in Tongshan, Southeast China. For each profile, soil samples were collected at depths of 0–10(topsoil), 10–20, 20–40, 40–60, 60–80, and 80–100 cm. Phosphorus accumulation was estimated from the difference in P contents between topsoil and parent material(60–100 cm subsoil). Phosphorus mobility was assessed from measurements of water-soluble P concentration(PSol). Finally, P sorption isotherms were produced using a batch sorption experiment and fitted using a modified Langmuir model. High total P contents of 1 980(S5), 3 190(S15), and 2 330(S30) mg kg~(-1) were measured in the topsoils versus lower total P content of approximately 600 mg kg~(-1) in the 80–100 cm subsoils. Likewise, topsoil PSol values were very high, varying from 6.4 to 17.0 mg L~(-1). The estimated annual P accumulations in the topsoils were 397(S5), 212(S15), and 78(S30) kg ha~(-1) year~(-1). Sorption isotherms demonstrated the dominance of P desorption in highly P-saturated topsoils, whereas the amount of adsorbed P increased in the 80–100 cm subsoils with slightly larger P adsorption capacity. The total P adsorption capacity of the 80–100 cm subsoils at a solution P concentration of0.5 mg L~(-1) was 15.7(S5), 8.7(S15), and 6.5(S30) kg ha~(-1), demonstrating that subsoils were unable to secure P concentrations in leaching water below 0.5 mg L~(-1) because of their insufficient P-binding capacity.     

Rising utilization of stable isotopes in tree rings for climate change and forest ecology

Analyses of stable isotopes(C, O, H) in tree rings are increasingly important cross-disciplinary programs. The rapid development in this field documented in an increasing number of publications requires a comprehensive review. This study includes a bibliometric analysis-based review to better understand research trends in tree ring stable isotope research. Overall, 1475 publications were selected from the Web of Science Core Collection for 1974–2023.The findings are that:(1) numbers of annual pu...     

阿克苏市3种绿化乔木树干液流日变化特征

为了测算园林树木的蒸腾耗水量,应用热脉冲技术对阿克苏市3种常见绿化乔木(小叶白蜡、法国梧桐、桑树)进行树干液流的测定,并分析其日变化规律,同时运用自动气象站记录各气象参数数据,分析树干液流日变化与气象因子之间的相关性。结果显示：3种乔木树干液流速率之间有一定的差异,但其日变化过程几乎相似,均有明显的昼夜变化规律。白天的液流速率比夜间大,午间由于太阳辐射( Rs)过强出现午休现象,凌晨和晚上树干液流速率较低,夜间保持微弱的树干液流过程。小叶白蜡、法国梧桐、桑树等树干液流日变化都与太阳辐射、空气温度( Ta)、风速( Ws)呈显著正相关,而与空气湿度( H)呈显著负相关;逐步回归模型显示,影响小叶白蜡树干液流的主要气象因子是太阳辐射和空气湿度,模型拟合度为0.962,法国梧桐的是空气温度和空气湿度,拟合度为0.971,桑树的是空气温度和太阳辐射,拟合度为0.915。不同乔木的日累计液流量大小排序为小叶白蜡(57000±2400) mL﹥法国梧桐(55400±2100) mL﹥桑树(7600±1800)mL。     

Unveiling how vitrification affects the porcine blastocyst: clues from a transcriptomic studyOA

Background: Currently, there is a high demand for efficient pig embryo cryopreservation procedures in the porcine industry as well as for genetic diversity preservation and research purposes. To date, vitrification(VIT) is the most efficient method for pig embryo cryopreservation. Despite a high number of embryos survives in vitro after vitrification/warming procedures, the in vivo embryo survival rates after embryo transfer are variable among laboratories. So far, most studies have focused on c...     

Effect of protease supplementation on apparent ileal crude protein and amino acid digestibility of over-processed soybean meals in broilersOA

Background: Nutritional value of proteins in feed ingredients can be negatively affected by hydrothermal processing, which causes large variation in the bioavailability of amino acids(AA) and negatively affects animal productive performance. Supplementation of exogenous proteases could increase the rate of digestion of damaged proteins, thereby increasing overall AA digestibility and bioavailability. The aim was to determine the effect of exogenous protease supplementation on the apparent ileal ...     

IFA和ELISA检测J亚群禽白血病病毒的比较研究

为比较3种禽白血病病毒(ALV)抗原检测ELISA试剂盒的特异性和灵敏度,将J亚群禽白血病病毒(ALV-J)传染性克隆rNX0101株以病毒原液(9×103TCID50)、10倍病毒稀释液(9×102TCID50)、100倍病毒稀释液(90 TCID50)接种培养于6孔板的DF1细胞,每孔均提前放入灭菌的细胞爬片,于接种后第1~6天每天取上清用3种ELISA试剂盒(A、B、C)检测ALV p27抗原,同时在接种后的第3天和第6天取出细胞爬片进行间接免疫荧光法(IFA)检测。结果表明,IFA方法对高、中、低剂量接种3 d后均可检出ALV-J的感染,而ELISA试剂盒中只有A试剂盒在高剂量接种时才能检出,试剂盒B和试剂盒C最早要在第4天才可检出;中、低剂量接种,3种试剂盒在第4~5天才能检出;第6天时,由于病毒的明显复制,无论IFA方法还是3种ELISA试剂盒都可检出ALV-J的感染。本研究结果为正确选择商品化禽白血病抗原检测试剂盒提供了借鉴。     

Ground vegetation,forest floor and mineral topsoil in a clear-cutting and reforested Scots pine stands of different ages: a case studyOA

Scots pine( Pinus sylvestris L.) is a dominant tree species on nutrient-poor sandy soils in the Baltic region’s hemiboreal forests. A final clear-cut in commercial stands is a common practice. However, the maintenance of relatively stable vegetation indices and ecological processes throughout the rotation promote new scientific and social debates. Overall, clear-cuttings disturb forest functions for a certain period, i.e., phytocenoses with forest-based species composition, biodiversity, and veg...     

兽用消毒剂及兽医消毒工作重要作用

养殖业发展到今天的规模化集约化，养殖规模大的惊人，经济效益在无传染病发生的情况的确为养殖业带来了可观的经济效益，同时为推动经济建设和改善人类生活水平做出了重大贡献，但是养殖业发展到今天，而实际上已经有很多问题在困扰着广大养殖业，那就是畜禽类一直以来所定时发生的流行性传染病发所给整个养殖业所带来的巨大经济损失，从而不得不借助大量的畜药，大量的抗生素药物来对抗疫情的发生，从而带来食品的严重污染，