共查询到19条相似文献，搜索用时 265 毫秒
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目前,甜柿由于具有生长快、结果早、易丰产、品质佳,树上自然脱涩,即摘即食,耐贮运,效益高等特点,成为北方农村发展经济首选树种之一, 但某些地区, 某些品种不能自然脱涩,分析其主要原因如下:1 栽植区域不合适我国栽植的甜柿大多是从日本引进,有完全甜柿和不完全甜柿两类。甜柿脱涩需要一定的温度,低温地区因积温不足或果实发育期温度达不到脱涩需要, 自然脱涩不完全,故在栽植时一定要考虑温度是否适宜,要做到因地制宜发展。2 光照不足甜柿喜光,应选背风向阳地方栽植,光照不足,不仅着色不好, 而且会造成脱涩不完全, 在建园选址时要注意,同时… 相似文献
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柿果脱涩机理及人工脱涩方法 总被引：1，自引：0，他引：1
<正>柿的涩味主要来自果肉中的单宁物质(C14H20O9),柿果是诸多果实中单宁含量最多的水果。日本学者梶浦(1946)根据果实脱涩与果肉褐斑形成和种子数目的关系,将柿分为完全甜柿、完全涩柿、不完全涩柿和不完全甜柿4个品种群。我国传统产区主要栽培完全涩柿,自‘罗田甜柿’被发现和确认为我国第1个原产完全甜柿种质以来,又相继报道了‘宝盖甜柿’和‘秋焰甜柿’(鄂柿1号)等,但迄今尚未发现我国原产的不完全涩柿和不完全甜柿品种。本文主要对完全甜柿和完全涩柿2个品种群柿果的脱涩机理及完全涩柿人工脱涩方法进行阐述,旨在为果树生产者提供参考。 相似文献
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柿树乙醇脱氢酶活性与可溶性单宁含量的关系 总被引：1，自引：0，他引：1
研究了4种不同脱涩类型柿(Diospyros kaki Thunb)果实和叶片中的可溶性单宁含量、乙醇脱氢酶（alcohol dehydrogenase, ADH）活性和ADH最适反应温度,以了解ADH在脱涩过程中的作用。结果表明：不完全甜柿和完全甜柿果实发育前期,可溶性单宁含量逐渐降低,ADH活性逐渐增高,到果实基本完成脱涩后,ADH活性又开始降低,在不完全甜柿中变化较大;涩柿和不完全涩柿在果实近熟期,可溶性单宁含量有所下降,但不能完成脱涩,且ADH活性较低。叶片发育过程中,可溶性单宁含量的变化与ADH没有相关性。乙醇脱氢酶的最适反应温度在25℃左右。ADH与柿果实脱涩有一定关系。 相似文献
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甜柿是近几年来渐趋热销、深受消费者喜爱的水果之一,分为完全甜柿和不完全甜柿。果实中不管有无种子,均能在树上自然完全脱涩的为完全甜柿,如次郎、前J11次郎、富有、上西早生、砂身、阳丰、兴津、新秋、骏河、花御所和秋焰等品种;果实种子多时能在树上脱涩, 相似文献
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柿果综合保鲜技术研究 总被引：1，自引：0，他引：1
在柿果贮藏期采用乙烯抑制剂、乙烯吸收剂、涂膜刺、CO2释放剂、脱氧剂等对无核甜柿进行处理,用不同的方式进行保鲜贮藏.研究各种保鲜因素对柿果硬度的影响.结果表明:影响硬度指数的因素顺序为:贮藏方式>乙烯抑制剂>乙烯吸收剂>涂膜剂>CO2释放剂>脱氧剂.贮藏方式达极显著差异,乙烯抑制剂、乙烯吸收剂、涂膜剂均达显著差异,CO2释放剂和脱氧剂无显著差异.说明最优柿果综合保鲜技术工艺是:篮子贮藏;质量百分数0.02%赤霉素浸果;丙二醇、丙三醇混合涂膜;吸附有高锰酸钾的沸石作为乙烯吸收剂;柠檬酸、NaHCO3、活性炭为CO2释放剂;铁粉、CaC12为脱氧剂. 相似文献
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甜柿品种在甘肃省天水地区的引种试验研究 总被引：1，自引：0，他引：1
2001 年引进甜柿品种7个,在甘肃省天水地区对其物候期、生长量和产量、抗寒性、果实品质等方面进行了连续7 a的观察和对比试验,得出富有、次郎、禅寺丸、西村早生、阳丰这5个品种在幼龄阶段,生长正常,抗旱、寒能力强,在天水市原柿树主产区的范围内可以栽培,新秋、兴津等2个品种不宜在天水发展或限制发展. 相似文献
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研究了0.25、0.50、1.00 μL · L-1 浓度的1–甲基环丙烯（1-MCP）对4 ℃冷藏条件下‘阳丰’甜柿果实成熟生理和冷害发生的影响。结果表明：1-MCP处理推迟了冷害症状的出现,降低了果实细胞膜透性和丙二醛（MDA）含量;延缓了乙烯释放高峰出现的时间并降低了峰值;对呼吸速率没有明显影响;提高了超氧化物歧化酶（SOD）和过氧化氢酶（CAT）活性;对多酚氧化酶（PPO）和过氧化物酶（POD）活性变化有一定的抑制作用。1.00 μL · L-1 1-MCP对冷害的控制作用比其他两个浓度更显著。 相似文献
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KAY Ryugo 《The Journal of Horticultural Science and Biotechnology》2013,88(2):195-200
Net assimilation rates of sweet cherry (Prunus avium) and persimmon (Diospyros kaki) seedlings were compared on the bases of dry weight and heat of combustion of the assimilated product. The rates were slightly faster for cherry than for the slow-growing persimmon on both bases probably because the former provided a larger sink. The heat content of the two species was nearly the same. The gross calorific values for these two woody species were approximately 5% higher than for the herbaceous sunflower (Helianthus annuus), but 15% lower than for shoots of two coniferous species. These findings account, in part, for the disparity of the net assimilation rates between herbaceous and woody species when compared on dry weight basis. 相似文献
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Effect of foliar applied phosphatic fertilizer on absorption pathways, yield and quality of sweet persimmon 总被引：1，自引：0，他引：1
Pot and field experiments were conducted to identify nutrient absorption pathways, growth, yield and quality of sweet persimmon using 32P tagged fermented mono-calcium di-hydrogen phosphate (FMCP) and normal FMCP fertilizer, respectively. In pot experiment, lower surface treated leaf absorbed higher amount of radionuclide phosphorus than upper surface treated leaf and phosphorus absorption increased with the increase in duration. The highest radioactive phosphorus absorption obtained was 8.88 × 104 and 3.57 × 104 Bq/g dry weight of leaf against dorsal and ventral treated leaf surfaces at 96 h after fertilizer application. During experimentation, stomata were closed from 2 to 10 h after application of FMCP fertilizer and nutrient absorption was higher in the lower surface than the upper surface. As a result, phosphorus was absorbed through cuticle by diffusing in aqueous pores in lower surface of leaf. Alternate day and night (24–96 h), lower surface also performed higher amount of phosphorus absorption than upper surface of leaf due to stomatal activity and aqueous pores because lower surface contains higher number of stomata than upper surface of sweet persimmon. It may be concluded that aqueous pores as well as stomata can be important pathways for the absorption of foliar applied FMCP fertilizer. In field experiment, foliar application of normal FMCP fertilizer increased the vegetative growth, number of effective flowering buds and decreased insect–disease infestation of sweet persimmon over control. Sweet persimmon yield increased due to the fact of decreasing trend of fruit dropping by foliar fertilization. Maximum fruit number (1110 and 1449 per tree) was observed in T4 (foliar spray @ 7.5 ppm P of FMCP fertilizer) and T5 (alternate foliar spray of 10 and 7.5 ppm P of FMCP fertilizer) treatments in 2005 and 2006, respectively. In T4 and T5 treatments, the average fruit yield increased by 153.0 and 211.4 kg tree−1 in 2005 and 2006 over control, respectively. FMCP fertilizer gave maximum fruit yield in T4 and T5 treatments in 2005 and 2006, respectively and it differed from other foliar treatments including control. Treatment T5 increased fruit hardness (2.32 kg/Ø 5 mm), 0brix content (14.0%) and reduced acidity (0.018%) in 2005. These results allow us to infer that foliar application of FMCP fertilizer was not only augmenting the fruit yield of sweet persimmon but also improved the quality of produce. 相似文献