腐植酸复混肥对新疆膜下滴灌加工番茄产量和品质的影响

以番茄为试材,采用膜下滴灌方式,对比不同腐植酸复混肥的施用量和配比对番茄的产量与品质指标及经济效益的影响,以确定适合新疆地区加工番茄施腐植酸肥施用的适宜用量和方法。结果表明:增施腐植酸复混肥均能提高加工番茄的单株结铃数、单果质量和产量;腐植酸复混肥对加工番茄的可溶性固形物、番茄红素、硝酸盐、亚硝酸盐、总酸、总糖和维生素C含量及pH影响显著。硫酸钾和氯化钾在番茄品质上的作用有差异,硫酸钾主要增加了番茄红素、硝酸盐、总酸含量,氯化钾主要增加了pH、可溶性固形物、总糖、维生素C含量,其中硫酸钾适宜配在基肥中,氯化钾适宜配在追肥中。综合性价比,适宜推荐加工番茄腐植酸复混肥基肥配方为N-P-K配比9-17-12,腐植酸为17.5kg,微量元素为0.5kg,有机质为12.5kg,膨润土为7.5kg。复混肥追肥配方N为115g·L~(-1),K为50g·L~(-1),腐植酸为161g·L~(-1),微量元素为0.3 g·L~(-1),每7 d追肥一次,追肥2 100L·hm~(-2),增产幅度达到10.73%。     

Nuclear Resonance Properties of YBa2Cu3O6+x Superconductors

Nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) results for copper-63, oxygen-17, and yttrium-89 nuclei in the superconducting composition range of YBa(2)Cu(3)O(6+x) (0.4 相似文献   

Comparison of a competitive inhibition ELISA and the card agglutination test for detection of antibodies to Anaplasma marginale and Anaplasma centrale in cattle

OBJECTIVE: To compare a recently developed recombinant MSP-5 competitive inhibition ELISA with a card agglutination test for detection of antibodies to Anaplasma marginale and Anaplasma centrale in Australian cattle. MATERIALS AND METHODS: The ELISA was compared with the card agglutination test using 208 sera from cattle in Anaplasma-free herds, 86 sera from cattle experimentally infected with A marginale or A centrale and 757 sera from cattle in areas endemic for A marginale. RESULTS: The specificity of the ELISA, based on testing 208 sera from cattle in Anaplasma-free areas, was 99.5%, and the sensitivities for detection of antibodies to A marginale and A centrale in sera from the experimentally infected cattle were 98.0% and 100%, respectively. For the same sets of sera, the specificity of the card agglutination test was 98.6% and the sensitivities for detection of antibodies to A marginale and A centrale were 98.0% and 100%, respectively. For the 757 sera collected from cattle in areas endemic for A marginale, the agreement between the ELISA and the card agglutination test depended on the positive threshold selected for the ELISA. The maximum achievable agreement was 91.5% (kappa = 0.73; 95% confidence interval 0.66, 0.79). CONCLUSION: We conclude that the competitive inhibition ELISA is a useful alternative to the card agglutination test for detection of A marginale or A centrale infection in cattle. The assay should be particularly useful for epidemiological applications such as prevalence studies and control programs.     

Simulated increase of hurricane intensities in a CO2-warmed climate

Hurricanes can inflict catastrophic property damage and loss of human life. Thus, it is important to determine how the character of these powerful storms could change in response to greenhouse gas-induced global warming. The impact of climate warming on hurricane intensities was investigated with a regional, high-resolution, hurricane prediction model. In a case study, 51 western Pacific storm cases under present-day climate conditions were compared with 51 storm cases under high-CO2 conditions. More idealized experiments were also performed. The large-scale initial conditions were derived from a global climate model. For a sea surface temperature warming of about 2.2 degrees C, the simulations yielded hurricanes that were more intense by 3 to 7 meters per second (5 to 12 percent) for wind speed and 7 to 20 millibars for central surface pressure.     

巴旦杏砧木组织培养及植株再生

以新疆南疆咯什、和田地区的巴旦杏砧木品种桃巴旦、石头巴旦树上当年结的种子为试材,先用赤霉素打破休眠,消毒后接种子诱导生长及分化的培养基上。生长约一个月后,将由试管中种子培养长成的小植株剪切成长约1cm的单芽茎段,接入增殖培养基,20d后将增殖伸长的嫩茎用于生根,再将生根后的巴旦杏苗移栽到珍珠岩基质中培养,进行有效的移栽驯化管理,获得了较理想的移栽成活率。成功地进行了离体组织培养及植株再生。     

林业病虫害防治工作中的问题及对策

林业有害生物防治是国家减灾工程的重要组成部分,通过对乌拉特前旗林业有害生物防治工作存在问题的分析,提出了解决这类问题切实可行的对策措施。     

克拉玛依果树腐烂病病原菌鉴定及其拮抗菌的筛选

【目的】提高克拉玛依果树腐烂病生物防治的效率,为相关果树高效生物防治提供科学依据和物质基础。【方法】从克拉玛依林杨的苹果树和李子树腐烂病发病植株及周边采集病灶和土壤样品,分析病原菌及其拮抗菌的筛选及微生物分子鉴定及拮抗效果。【结果】苹果树和李子树腐烂病病原菌均黑腐皮壳菌属（Valsa）,其中李子树病原菌涉及该属的两个种：Valsa mali 和Valsa leucostoma ,而苹果树病原菌仅为Valsa mali。同时获得各类真菌拮抗菌15株,涉及4个属9个种,筛选到具有高效拮抗细菌2株,其最大抑菌圈菌落比分别达到2-11和2-79。【结论】菌株芽孢杆菌B4和B6对果树腐烂病具有较好的抑菌效果,研究报道了李子树腐烂病病原菌,为相关果树的高效生物防治提供了科学依据和物质基础。