辽宁树莓灰霉病发生危害及病原鉴定

首次对辽宁地区树莓灰霉病进行了调查、采样,并将病菌分离纯化。根据病害症状特点、病菌形态特征、培养性状和致病性测定等进行鉴定。结果表明：树莓灰霉病是由灰葡萄孢菌（Botrytis cinerea Pers.）侵染所致。     

干燥方式对树莓总酚、总黄酮含量及其体外抗氧化活性的影响

以树莓为试验材料,采用自然干燥、红外干燥、热风恒温干燥和真空冷冻干燥4种干燥方式处理树莓,超声波辅助提取法提取树莓样品中的总酚和总黄酮含量,体外DPPH·和ABTS^+·的清除能力,拓展树莓加工产品方式,提高树莓干燥效率和品质。结果表明:干燥处理后样品中总酚、总黄酮含量及对ABTS^+·和DPPH·清除能力不同程度降低,其中真空冷冻干燥样品总酚和总黄酮含量损失最少,分别为(2.47±0.29)mg·g^-1和(2.06±0.61)mg·g^-1,ABTS^+·和DPPH·清除能力最大,其IC50分别为(4.53±0.04)mg·mL^-1和(5.17±0.12)mg·mL^-1;真空冷冻干燥方式最适宜于树莓的干燥。     

盐碱胁迫对牛叠肚幼苗渗透调节物质及叶绿素含量的影响

为了探讨牛叠肚幼苗对盐碱胁迫的生理适应性,以盆栽牛叠肚组培苗为试材,就不同浓度的NaCl、Na2SO4、NaHCO3和Na2CO3胁迫处理对其叶片中的叶绿素含量和部分有机渗透调节物质的影响进行了试验。结果表明:在中性盐(NaCl、Na2SO4)和碱性盐(NaHCO3、Na2CO3)的胁迫处理下,牛叠肚叶片叶绿素的合成中均出现了"低促高抑"的现象,而游离脯氨酸的积累对叶绿素的合成并未起到直接作用。在单价盐碱(NaCl、NaHCO3)的胁迫处理下,牛叠肚幼苗主要通过可溶性糖、游离脯氨酸、可溶性蛋白的交替积累来发挥其渗透调节功能;在二价盐碱(Na2CO3、Na2SO4)的胁迫处理下,可溶性糖、游离脯氨酸和可溶性蛋白的积累趋势各异,其中,在Na2CO3胁迫条件下三者同步积累,共同发挥其渗透调节功能,而在Na2SO4的胁迫处理下,牛叠肚幼苗主要通过可溶性糖和可溶性蛋白的彼此协同作用来降低盐碱伤害,并且二者的积累有利于叶绿素的合成。     

攀西干旱河谷地区红树莓丰产栽培技术研究

2000年攀西地区干旱河谷退耕还林中,从国外成功引进红树莓,在西昌丰源农业公司普格五道菁、盐源枚雨、西昌安宁基地对红树莓在不同海拔,不同栽植密度和施肥条件下进行丰产栽培技术研究,取得了较好效果。     

覆盆子资源开发利用研究综述

对近年来我国覆盆子的研究与开发利用进行了综述,进入20世纪80年代以来,覆盆子研究在我国引起了关注,但从整体上看研究和开发利用还比较落后.为了更好地开发利用覆盆子资源,必须深入开展杂交育种、人工栽培、加工工艺、水土保持产业化等研究.     

贵州梵净山自然保护区悬钩子属植物资源考察及开发利用

对贵州梵净山自然保护中心的蔷薇科悬钩子属植物的野生种的分布、生长习性等现状进行了调查,共采集到31种2变种,其中梵净山悬钩子为梵净山特有种;绵果悬钩子、五叶鸡爪茶、无刺掌叶悬钩子为梵净山的新记录种;三花悬钩子、山莓、宜昌悬钩子、尾叶悬钩子分布最为广泛;绵果悬钩子、红腺悬钩子、宜昌悬钩子、尾叶悬钩子具有很高的利用价值和开发前景,并就该保护区悬钩子植物的开发利用潜力进行评价。     

Susceptibility of red raspberry varieties to raspberry bushy dwarf virus and its genetic control

Summary Red raspberry varieties known to be susceptible to raspberry bushy dwarf virus (RBDV) are listed. Experiments at East Malling suggest that some varieties previously thought to be immune to RBDV are not so although they are difficult to inoculate by grafting. Additional varieties tested may possibly be immune. The response of varieties derived from Lloyd George and segregation in progenies derived from resistant varieties suggest that the genetic control of susceptibility may be by dominant complementary genes.     

Rubus coreanus as donor of resistance to cane diseases and mildew in red raspberry breeding

Summary Strong resistance to the cane diseases Elsinoë veneta, Didymella applanata and Botrytis cinerea, and to Sphaerotheca macularis, occurred in F₁ and BC₁ derivatives of an accession of Rubus coreanus. Resistance to cane spot (E. veneta) was polygenic.In eight out of ten BC₁ progenies, average grades for cane spot infections were significantly higher in white-flowered (an ₁) than pink-flowered (An ₁) plants and in hairy-caned (H) than in glabrous (h) seedlings. It is postulated that in R. coreanus factors controlling resistance are linked with An ₁ and. probably, with h.Average grades for spur blight (D. applanata) were significantly higher in white-flowered plants in nine out of ten BC₁ progenies. Spininess (S) was associated with greater susceptibility in six out of eight BC₁ families, although this difference was not statistically significant.Plants with the phenotype hAn ₁ on average provided the best source of resistance to both cane spot and spur blight.     

The effect of nitrogen and boron soil applications on raspberry leaf N,B and Mn concentrations and on selected soil analyses

Abstract

Four years after yearly applications of N (0, 67, 134 and 268 kg/ha in a N rate trial) soil pH and soil extractable K, Ca and Mg were reduced. Boron application (1 kg/ha in a N x B interaction trial) increased hot water extractable soil B and soil extractable Mg. Old and new cane leaf N concentration was increased by N application but B application resulted in only a very small effect. Both N and B applications increased leaf B concentrations. Leaf Mn was increased by N application, probably because of the reduced soil pH. Boron had little effect on leaf Mn. It was concluded that leaf tissue is not suitable for determining the requirements of N and B fertilizer because of the instability of B concentrations in the leaves within and between seasons. Sampling of new cane leaves in July showed promise for diagnosing Mn requirements since the concentration during that month was relatively stable in three separate years of sampling.     

Soil Inorganic Nitrogen Content and Indices of Red Raspberry Yield,Vigor, and Nitrogen Status as Affected by Rate and Source of Nitrogen Fertilizer

Abstract

The single‐year response of soil inorganic nitrogen (N) content and indices of red raspberry (Rubus ideaus L.) yield, vigor, and N status to rate and source of fertilizer N were determined. Twenty‐nine trials were conducted in commercial plantings from 1994 to 1996. Treatments were 0, 55, or 110 kg N ha^?1 as ammonium nitrate or 55 kg N ha^?1 as a slow‐release fertilizer product containing 60% polycoated sulfur‐coated urea and 40% urea. Soil nitrate (NO₃) content frequently increased during the growing season, indicating that soil N supply was nonlimiting. The plant indices were generally insensitive to fertilizer‐N rate under these high‐N fertility conditions. Soil nitrate content measured after berry harvest was frequently excessive even at the recommended N rate and can be used to identify fields with excess N fertility. The slow‐release N fertilizer provided limited benefits compared with use of ammonium nitrate.