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41.
山葡萄的品质决定着葡萄酒的质量,葡萄浆果糖度决定着葡萄品质。葡萄成熟过程中浆果含糖量和含酸量是相互制约的,含糖量主要呈对数略显“S”型变化,含酸量呈指数曲线型变化。将成熟期葡萄浆果含糖量作为葡萄品质的评价指标,利用通化产区19952016年成熟期山葡萄浆果含糖量的实测数据与气象条件进行相关分析,得出山葡萄品质与5月9月上旬积温、7月8月日照时数、5月9月上旬水热系数、8月9月上旬积温关系密切,相关关系均通过了α为0.05或0.01的显著性检验。利用多元回归统计方法建立了山葡萄品质气象预测预报模型,模型的判定系数R^2为0.815,通过了α=0.01的显著性检验。模型的拟合检验平均误差百分率为3.91%。利用2017年、2018年资料对模型进行试报检验,误差百分率分别为1.59%和3.79%。模型具有较高的准确率,能够满足通化产区山葡萄栽培对气象预报和服务的需求。 相似文献
42.
试验了温室葡萄超氧化物气化酶（SOD）活性、过氧化氢酶（CAT）活性、游离脯氨酸（Pro）含量、丙二醛（MDA）含量和果粒生长对地表覆盖的响应。结果表明：整个生育期内,砂土覆盖、秸秆覆盖、秸秆+白地膜覆盖及秸秆+黑地膜覆盖都对0~40 cm土层土壤有显著的保水作用,其中秸秆+黑地膜保水性能最强（土壤含水量比无覆盖的提高14.53%,P<0.05）,且各覆盖方式的保水能力随着土层的加深而增强。秸秆+白地膜覆盖下葡萄细胞的抗氧化酶活性最高。砂土覆盖极显著（P<0.01）提高果粒内Pro含量（约增加42.40%）。砂土覆盖后葡萄果粒粒径最大,秸秆+地膜覆盖、秸秆覆盖下的果粒粒径均小于无覆盖的粒径。秸秆覆盖能够提高土壤水分含量,抑制果粒的增长。砂土覆盖可以作为温室葡萄适宜覆盖方式。 相似文献
43.
VitalyA.Stepanov 《东北亚地学研究》2004,7(2):173-180
The Bamsk gold-ore deposit is located in the Amur region, the Far East of Russia. It is confined to the Early Cretaceous volcanicoplutonic uplift of central type, located in the Stanov folded-clumpy Pre-Cambrian system. The deposit is presented by a series of gold-bearing quartz and carbonate-quartz vein-stringer zones. They are confined to the super-intrusive zone of the Nevachansk subvolcanic intrusion of sienite-porphyric composition. The mineralization is being controlled by zone of fractures developed in the autochthone of the Bamsk fault. Quartz, carbonates and sericite prevail in the composition of ores. The quantity of ore minerals doesn‘t exceed 1% ～ 5%. Pyrite, chalcopyrite, galena and native gold are widely spread, Sheelite, gold and silver tellurides, sulphobismuthites, acanthite, sphalerite and cinnabar are less developed. Four stages of mineralization have been distinguished. Gold-sulphide-sulphosalt ore with tellurides of gold and silver is productive for gold. The following set of elements is typomorphic for the ores of the deposit: Au, Ag, Cu, Bi, Mo, Pb and Sb (W1, Pb1, Mo) -Cu- (Ag, Bi, Sb, Mn, W2,, Pb2) form the vertical series of zoning. Rocks, enclosing the mineralization are exposed to the processes of listvenitization-beresitization. The processes of gumbeization and argillization are less manifested. The age of the gold mineralization, determined by Rb-Sr method on ore-accompanying minerals, is 130.6 Ma. 相似文献
44.
气象条件与酿酒葡萄糖分积累的关系 总被引：1，自引：0，他引：1
气象条件是影响葡萄糖分积累的主要环境因素之一.利用酿酒葡萄(赤霞珠)糖分观测数据和相应气象数据研究气象因子对酿酒葡萄糖分积累的影响发现,在酿酒葡萄着色至成熟期,对酿酒葡萄糖分积累影响较大的气象因子是日平均气温、最高气温、日照时数和温湿比.最适于糖分积累的平均气温、最高气温、日照时数和温湿比分别是24.0℃、29.3℃、6.4 h和0.35左右,在小于上述极值点的范围内,糖分日积累量随各因子(值)的增加而增加}在大于上述极值点的范围内,糖分日积累量随各因子(值)的增加而减少. 相似文献
45.
V. B. Kaplun 《Russian Journal of Pacific Geology》2009,3(2):185-196
Results of magnetotelluric soundings (MTS) along the profile plotted across the strike of the Middle Amur sedimentary basin are considered. The results of field studies are analyzed and different factors influencing the behavior of sounding curves are discussed. A reference curve and reference geoelectric section selected on the basis of the previous MTS works within the Middle Amur depression allowed us to compensate for the influence of different geoelectric inhomogeneities and construct a starting model for two-dimensional mathematical modeling based on the field data. As a result, a geoelectric model of the lithosphere structure in the Middle Amur sedimentary basin across its strike was compiled. 相似文献
46.
Influences of forest on MODIS snow cover mapping and snow variations in the Amur River basin in Northeast Asia during 2000–2014 
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下载免费PDF全文 Xianwei Wang Yuan Zhu Yaning Chen Hailing Zheng Henan Liu Huabing Huang Kai Liu Lin Liu 《水文研究》2017,31(18):3225-3241
The study applies the improved cloud‐free moderate resolution imaging spectral radiometer daily snow cover product (MODMYD_MC) to investigate the snow cover variations from snow hydrologic year (HY) HY2000 to HY2013 in the Amur River basin (ARB), Northeast Asia. The fractions of forest cover were 38%, 63%, and 47% in 2009 in China (the southern ARB), Russia (the northern ARB), and ARB, respectively. Validation results show that MODMYD_MC has a snow agreement of 88% against in situ snow depth (SD) observations (SD ≥ 4 cm). The agreement is about 10% lower at the forested stations than at the nonforested stations. Snow cover durations (SCDs) from MODMYD_MC are 20 days shorter than ground observations (SD ≥ 1 cm) at the forested stations, whereas they are just 8 days shorter than ground observations (SD ≥ 1 cm) at the nonforested stations. Annual mean SCDs from MODMYD_MC in the forested areas are 21 days shorter than those in the nearby farmland in the Sanjiang Plain. This indicates forest has a complex influence on the snow accumulation and melting processes and even on optical satellite snow cover mapping. Meanwhile, SCD and mean snow cover are negatively correlated with air temperature in ARB, especially in the snow melting season, when mean air temperature in March and April can explain 86% and 74% of the mean snow cover variations in China ARB and Russia ARB, respectively. From 1961 to 2015, the annual mean air temperature presented an increased trend by 0.33 °C/decade in both China ARB and Russia ARB, whereas it had a decrease trend from HY2000 to HY2013. The decrease of air temperature led to an increase of snow cover, which is different from the global decrease trend of snow cover variations. SCD and snow cover had larger increase rates in China ARB than in Russia ARB, and they were larger in the forested areas than in the nearby farmland in the Sanjiang Plain. 相似文献
47.
XiaoLin Lu WanChang Zhang ShuHang Wang Bo Zhang QuanFu Niu JinPing Liu Hao Chen HuiRan Gao 《寒旱区科学》2020,12(6):418-429
MODIS snow products MOD10A1\MYD10A1 provided us a unique chance to investigate snow cover as well as its spatial-temporal variability in response to global changes from regional and global perspectives. By means of MODIS snow products MOD10A1\MYD10A1 derived from an extensive area of the Amur River Basin, mainly located in the Northeast part of China, some part in far east area of the former USSR and a minor part in Republic of Mongolia, the reproduced snow datasets after removal of cloud effects covering the whole watershed of the Amur River Basin were generated by using 6 different cloud-effect-removing algorithms. The accuracy of the reproduced snow products was evaluated with the time series of snow depth data observed from 2002 to 2010 within the Chinese part of the basin, and the results suggested that the accuracies for the reproduced monthly mean snow depth datasets derived from 6 different cloud-effect-removing algorithms varied from 82% to 96%, the snow classification accuracies (the harmonic mean of Recall and Precision) was higher than 80%, close to the accuracy of the original snow product under clear sky conditions when snow cover was stably accumulated. By using the reproduced snow product dataset with the best validated cloud-effect-removing algorithm newly proposed, spatial-temporal variability of snow coverage fraction (SCF), the date when snow cover started to accumulate (SCS) as well as the date when being melted off (SCM) in the Amur River Basin from 2002 to 2016 were investigated. The results indicated that the SCF characterized the significant spatial heterogeneity tended to be higher towards East and North but lower toward West and South over the Amur River Basin. The inter-annual variations of SCF showed an insignificant increase in general with slight fluctuations in majority part of the basin. Both SCS and SCM tended to be slightly linear varied and the inter-annual differences were obvious. In addition, a clear decreasing trend in snow cover is observed in the region. Trend analysis (at 10% significance level) showed that 71% of areas between 2,000 and 2,380 m a.s.l. experienced a reduction in duration and coverage of annual snow cover. Moreover, a severe snow cover reduction during recent years with sharp fluctuations was investigated. Overall spatial-temporal variability of Both SCS and SCM tended to coincide with that of SCF over the basin in general. 相似文献
48.
基于1994—2014年研究区葡萄的逐年商品果率数据,1965—2014年芜湖市逐月的气象数据和1981年7月至2014年6月国家气候中心的逐月88项新大气环流指数、26项海温指数,使用相关性分析、线性趋势、MannKendall和多元逐步回归分析,对影响葡萄商品果率的关键气候因子进行遴选,并在此基础上对遴选因子的近50年变化特征和短期气候预测进行了分析与研究。结果表明:影响葡萄商品果率的关键气候因子有7、8月的平均气温(T_7,T_8)、最高气温(T_(max7),T_(max8))、最低气温(T_(min7),T_(min8))、相对湿度(R_(H7),R_(H8))、日照时数(S_7,S_8),以及8月的平均气温日较差(ΔT_8),近50年T7、T_(max7)和T_(min7)显著升高,RH7、ΔT8和S8显著下降,其中T7、T_(max7)、ΔT_8的变化以渐变为主,而T_(min7)、R_(H7)、ΔT_8则发生过突变。这些关键气候因子与前期1年内的多项大气环流指数和海温指数显著相关,并遴选其中关键指数作为预测芜湖市7、8月葡萄商品果率关键气候因子的短期气候预测指标,计算出气候因子的预测方程,以期为葡萄种植能够有效应对气候影响、保证商品果率提供帮助。 相似文献
49.
采用顶空固相微萃取技术（HS-SPME）、气相色谱-质谱联用技术（GC-MS）对‘马瑟兰’葡萄果实中芳香物质成分进行分析,分别在萌芽期、新梢旺长期、开花期、果实第1次膨大期、副梢旺长期和果实第二次膨大期一次性施入氮肥,以不施氮肥作为对照（CK）,研究不同施氮时期对果实芳香物质组分及含量的影响。结果表明：‘马瑟兰’葡萄果实中共检测出40种芳香物质成分,总含量为1 789.49—3 320.29 μg·kg-1,其中有11种特征香气成分,以醇类和醛类化合物为主,氮素施用时期对果实芳香物质的成分和含量均有显著的影响;施氮可改变果实的香味特征,果实第二次膨大期施氮果实中芳香物质总含量最高且种类较多,有利于提高醇类、醛类及烷烃类化合物含量;该处理改变了果实以草香味为主的香味特征,此时花香和脂膏香最为浓郁;开花期施氮果实中草香、脂膏香和花香基本平衡,同时增加了果香味的比例。通过氮素施用时期可调控葡萄果实芳香物质的形成,进而改善果实的酿造品质。 相似文献
50.
通过对无核紫葡萄温室苗的生长发育及所处小气候环境条件的要素观测,掌握了该新品种葡萄苗木在哈密目光温室中的生长发育状况及所需的适宜气象条件,获取了无核紫葡萄温室生长的气候调控技术,为苗木的大量繁育和该品种的大面积推广提供了支撑。 相似文献