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《中国农业信息》2013,(4):26
第一部分160个主导品种
1 水稻(30个)
1.1长江流域
(1)Y两优1号:适宜在海南、广西南部、广东中南及西南部、福建南部的稻瘟病轻发的双季稻区作早稻种植,以及在江西、湖南、湖北、安徽、浙江、江苏的长江流域稻区(武陵山区除外)和福建北部、河南南部稻区的稻瘟病、白叶枯病轻发区作一季中稻种植.
(2)新两优6号:适宜在江西、湖南、湖北、安徽、浙江、江苏的长江流域稻区(武陵山区除外)以及福建北部、河南南部稻区的稻瘟病轻发区作一季中稻种植.
(3)中浙优1号:适宜于在长江流域作单季稻种植.
(4)五优308:适宜中北稻作区和粤北稻作区早、晚造种植.国家审定:适宜广西区中北部、广东省北部、福建省中北部、江西省中南部、湖南省中南部、浙江省南部双季稻区作晚稻种植. 相似文献
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[目的]为高产高抗杂交水稻新组合湛优2009的大面积推广应用提供参考。[方法]介绍湛优2009的主要特征特性、产量表现、栽培技术要点及制种技术要点等。[结果]湛优2009是用湛A与恢2009配组育成的高产高抗稻瘟病籼型三系杂交水稻新组合,2011年通过广东省农作物品种审定。广东省区试和生产试验结果表明,该组合丰产性好,高抗稻瘟病,抗倒力较强,耐寒性强。[结论]湛优2009适宜广东省粤北以外稻作区早、晚造种植,具有较好的推广应用前景。 相似文献
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Web2.0,以个人为中心的互联网时代的到来 总被引:15,自引:0,他引:15
本文介绍了Web2.0的知识和背景,对Web2.0出现的基础以及典型技术和应用作了阐述,同时对其作出了前景展望。 相似文献
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【目的】 研究盐胁迫条件下,葡萄叶片中多胺含量、多胺氧化酶、多胺合成酶活性以及激素的动态变化,研究不同盐胁迫强度对多胺类物质及激素代谢的影响。【方法】 采用盆栽基质培养模拟盐胁迫环境,设置4个NaCl处理梯度:0 (CK)、1、2和3 g/kg。多胺和激素含量的测定采用高效液相色谱法,多胺合成及分解酶活性的测定采用紫外分光光度计比色法。【结果】 盐胁迫处理后,葡萄叶片中多胺含量和脱落酸含量较对照而言显著增加,玉米素含量显著降低,随胁迫时间的延长,Put、Spm、Spd、ABA以及PAO、DAO、ADC、ODC、SAMDC活性均呈先上升后下降趋势,在10 d及10 d后达到峰值。ZT呈逐渐下降的趋势,并随胁迫强度增大而减小;进行显著性分析后,叶片中多胺含量与Put、Spm、Spd含量呈极显著正相关,DAO、ADC、ODC活性与Put含量呈显著正相关,PAO与SAMDC活性与Spm和Spd含量也呈极显著正相关。【结论】 3种多胺经酶的合成代谢后和激素共同缓解葡萄苗所遭受到的盐胁迫,期间主要发生作用的是多胺合成酶,盐胁迫下多胺与激素含量之间的变化关系也十分密切。 相似文献
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以抚顺地区3个国家基本站50余年气象资料为依托,采用Microsoft Excel工作表实现由气候和农业气候2部分构成的气象与农业综合信息处理系统的基本思路、方法、内容、用途和使用情况。为了实现气候分析及应用的科学化、客观化、系统化、规范化、程序化及连续化的业务目标,按业务流程设计与实现的,包括资料处理、气候趋势模拟、气候预测、气候鉴定、季节性信息化处理、农作物产量预报、气候生产潜力分析等一系列内容在内的系统建设。关键是解决了大量的计算问题,建立了区域性通用模式。 相似文献
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Yan Han Shi Guoxu 《农业科学与技术》2007,8(1):14-20
Urban water consumption has some characteristics of grey because it is influenced by economy, population, standard of living and so on. The multi-variable grey model (MGM(1,n)), as the expansion and complement of GM(1,1) model, reveals the relationship between restriction and stimulation among variables, and the genetic algorithm has the whole optimal and parallel characteristics. In this paper, the parameter q of MGM(1,n) model was optimized, and a multi-variable grey model (MGM(1 ,n,q)) was built by using the genetic algorithm. The model was validated by examining the urban water consumption from 1990 to 2003 in Dalian City. The result indicated that the multi-variable grey model (MGM(1,n,q)) based on genetic algorithm was better than MGM(1,n) model, and the MGM(1,n) model was better than MGM(1,1) model. 相似文献
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Molecular detection of virulence genes in Campylobacter species isolated from livestock production systems in South Africa 下载免费PDF全文
Campylobacter species are a major cause of foodborne bacterial infections in both developed and developing countries worldwide. Campylobacter jejuni is responsible for the majority of infections. This study was conducted to identify virulenceassociated genes in Campylobacter species isolated from livestock production systems in South Africa. A total of 250 fecal samples consisting of cattle(n=50), chickens(n=50), goats(n=50), sheep(n=50) and pigs(n=50) were randomly collected from livestock in Eastern Cape and KwaZulu-Natal provinces of South Africa between April and October 2018. The samples were analyzed for the presence of virulence genes in Campylobacter species using molecular PCR-based methods. It was found that 77 and 23% of Campylobacter jejuni and Campylobacter coli respectively were isolated from all the livestock samples. There were positive significant(P0.05) correlations amongst all the virulence genes that were investigated. Chisquare and Fisher's exact tests were implemented to test for the effect of livestock species on the presence or absence of virulence genes. The study demonstrated that most of livestock species can potentially cause zoonotic infections and food poisoning due to the high prevalence of Campylobacter. The high prevalence of virulence genes highlights the significance of Campylobacter in livestock production systems in South Africa. This requires the implementation of one-health approaches to reduce the impact of foodborne and zoonotic diseases for the welfare of human and animal health. 相似文献
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红苕饲粮中添加铜和/或喹乙醇对猪生产性能及某些血液生化指标的影响 总被引:1,自引:0,他引:1
选体重约38公斤的长白(♂)×成华(♀)杂交猪20头,随机分为四组,饲予四种不同的饲粮,研究饲粮中添加铜和/或喹乙醇对猪生产性能和某些血液生化指标的影响。结果表明:基础组、加铜组、加喹乙醇组和两者同时加组全期日增重分别为674、761、796、678克,日采食量分别为2.50、2.65、2.74、2.40公斤,饲料利用率分别为3.73、3.49,3.44、3.54,添加铜和/或喹乙醇对试验第65天血清铜兰蛋白、尿素氨及屠宰率、背膘厚和眼肌面积无显著影响(p>0.05);添加铜使65天血清碱性碱酸酶活性极显著增高(p<0.01),添加喹乙醇有使之升高的趋势,两者同时添加时,碱性酸磷酶活性降低。 相似文献
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不同施肥水平对木薯氮磷钾养分积累、分配及其产量的影响 总被引:13,自引:0,他引:13
【目的】通过比较不同施肥水平下木薯氮磷钾养分积累、分配和产量的差异,探讨粤北坡岗地优质高产木薯氮磷钾养分的最佳用量。【方法】以木薯品种南美119为材料,采用“3414”方案,在粤北翁源进行大田试验。试验共设14个处理。【结果】施肥处理的氮素主要分配到地上部,不施肥处理的氮素则主要分配到根部;不同施肥处理的磷素均主要分配到地上部;不施肥处理和不施钾处理的钾素主要分配到根部,不施氮处理的钾素在根、冠间分配较均衡。在木薯不同生长阶段,植株氮磷钾含量均呈下降趋势,但施氮、磷、钾化学肥料处理植株氮磷钾含量的下降速度小于不施氮、磷、钾化学肥料的处理。处理N2P2K2的氮、磷、钾含量和积累量在各生育期均为最大,不施肥处理(N0P0K0)的氮、磷、钾含量和积累量在各生育期均为最小(P<0.05)。产量最高的是N2P3K2处理,为22 694.06 kg·hm-2,其次是N2P2K2处理,为21 417.87 kg·hm-2。【结论】木薯产量、氮磷钾养分积累及其在根冠间的分配,对施肥水平高度敏感, 适当比例的氮磷钾肥配合施用既可以显著增加木薯植株的氮磷钾含量和积累量,又可以提高产量。在粤北坡岗地木薯生产中,氮素最重要,在氮素得到满足的条件下,磷素较钾素更重要。在本试验条件下,氮磷钾养分最佳用量为358.80 kgN·hm-2、89.10 kg P2O5·hm-2和187.50 kg K2O·hm-2。 相似文献
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Yulin Jia Guangjie Liu Stefano Costanzo Seonghee Lee Yuntao Dai 《Frontiers of Agriculture in China》2009,3(3):231-239
Analysis of genetic interactions between rice and its pathogenic fungi Magnaporthe oryzae and Rhizoctonia solani should lead to a better understanding of molecular mechanisms of host resistance, and the improvement of strategies to manage
rice blast and sheath blight diseases. Currently, dozens of rice resistance (R) genes against specific races of the blast fungus have been described. Among them, ten were molecularly characterized and
some were widely used for breeding for genetic resistance. The Pi-ta gene was one of the best characterized rice R genes. Following the elucidation of its molecular structure, interaction, distribution, and evolution, user friendly DNA
markers were developed from portions of the cloned genes to facilitate the incorporations of the Pi-ta mediated resistance into improved rice varieties using marker assisted selection (MAS). However, rice blast is still a major
threat for stable rice production because of race change mutations occurring in rice fields, which often overcome added resistance
based on single R genes, and these virulent races of M. oryzae pose a continued challenge for blast control. For sheath blight, progress has been made on the exploration of novel sources
of resistance from wild rice relatives and indica rice cultivars. A major quantitative trait locus (QTL), named qSB9-2, was recently verified in several mapping populations with different phenotyping methods, including greenhouse methods. The
ability to identify qSB9-2 using greenhouse methods should accelerate the efforts on the qSB9-2 fine mapping and positional cloning. 相似文献
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不同蔬菜对潮褐土镉铅锌复合污染的吸收效应研究 总被引:8,自引:4,他引:8
在潮褐土Cd、Pb、Zn污染区,采集不同蔬菜和土壤样品,对其中所含的Cd、Pb、Zn的含量进行了测定。结果表明,胡萝卜、茄子、芥菜、丝瓜、番茄、辣椒属低度累积型;白萝卜、菜花、莴苣、大葱、小白菜、韭菜为中度累积型;芹菜、茴香、香菜、圆白菜、蓬蒿属重度累积型;白菜、油菜可归为极重度累积型。 相似文献
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分析测定了产自北京、吉林、云南、广西的115个水稻品种(品系)的糙米及其中12个品种的精米的 Fe,Zn,Ca,Se 四种元素的含量。结果表明:①115份糙米的上述四种元素的平均含量(μg·g~(-1))分别为21.31,42.12,205.91,0.0621不同品种间四种元素的含量差异常很大;②不同种皮颜色的糙米间各元素含量的差异多数不显著;③产自不同地区的糙米间四种元素含量的差异极显著,广西米的各元素含量最高,北京米其次;④糙米中四种元素的含量高于相应的精米的含量;⑤稻米中 Ca,Zn 含量呈极显著的正相关关系。 相似文献