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1.
治枯灵防治茄子黄萎病、瓜类枯萎病新技术近几年来，各地茄子黄萎病和西瓜、黄瓜、甜瓜枯萎病逐年加重，轻则减产，重则绝收，成为茄子、瓜类的毁灭性病害。我们用特效新药──治枯灵，进行了防治试验，控制了枯、黄萎病的发生。一、病情与危害茄子黄萎病多在门前座果后开... 相似文献
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茄子黄萎病发生及综合防治技术 总被引：2，自引：0，他引：2
茄子是人们喜食的主要果菜之一，由于它营养丰富，食用多样，供应期长，故我国北方露地茄子栽培面积很大，随着茄子种植面积的扩大，连作现象严重，土壤病原菌逐年增多，使茄子黄萎病逐年加重。茄子黄萎病俗称半边疯、黑心病，是茄子的主要病害之一。一般年份发病率40％-50％，严重年份发病率达70％以上，使茄子大幅度减产， 相似文献
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近几年来,随着茄子面积的扩大,地块倒不开茬口,土壤中病原菌增多,加之温度偏低的发病条件,使茄子黄萎病逐年加重。一般年份发病率为40％～50％,严重年份发病率达70％以上,使茄子大幅度减产,甚至绝收。茄子黄萎病一直被视为不治之症,成为难以防治的难题。防治茄子黄萎病,是茄子高产增收的保证。 相似文献
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治枯灵防治茄子黄萎病瓜类枯萎病效果好张振林（吉林省乾安县乾安镇政府·乾安１３１４００）据近期调查，各地茄子黄萎病和西瓜、甜瓜、黄瓜枯萎病有逐年加重的趋势，并成为现实蔬菜生产上一个难题。为此，我们采用厂家直接提供的新药——治枯灵进行了防病试验，并获得了... 相似文献
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茄子黄萎病又称半边疯、黑心病、凋萎病,是危害茄子的重要病害。近年来,该病的发生呈逐年加重之势,一般年份发病率在40％～50％,严重年份发病率高达70％以上,给广大茄农造成巨大损失。 相似文献
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正近几年来,随着茄子面积的扩大,地块倒不开茬口,土壤中病原菌增多,加之温度偏低的发病条件,使茄子黄萎病逐年加重。一般年份发病率为40%~50%,严重年份发病率达70%以上,使茄子大幅度减产,甚至绝收。茄子黄萎病一直被视为不治之症,成为难以防治的难题。防治茄子黄萎病,是茄子高产增收的保证。茄子黄萎病多在门茄座果后发病,盛果期病株急剧增加。发病初期,植株中下部叶片脉间或叶缘萎黄上卷逐渐向上发 相似文献
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近几年来，随着茄子种植面积的扩大，连作现象严重，土壤病原菌逐年增多，加之夏季温度偏低，使茄子黄萎病逐年加重。一般年份发病率40%～50%，严重年份发病率达70%以上，使茄子大幅度减产，甚至绝收。为有效防治茄子黄萎病，就要了解其发生特点，做到早发现早预防，现介绍如下。一、病害症状茄子黄萎病多在门茄坐果后发病，盛果期病株急剧增加。发病初期，植株中下部叶片叶脉间或叶缘萎黄上卷，逐渐向上发展，使半边枝叶变黄枯死，果实僵化不长，因此，又叫半边疯。严重时全株枯死，叶片脱落，变成光杆。剥开根、茎皮层，可见维管束变成褐… 相似文献
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以设施栽培茄子为试材，在连作茄子10年以上的连栋塑料温室内，采用人工浇灌方法，研究了使用4种常用微生物菌剂处理对黄萎病高发区设施连作茄子产量、品质、黄萎病发病率和病情指数的影响，以期为设施连作茄子黄萎病使用生物防控提供参考依据。结果表明：4种微生物制剂均能显著提高茄子产量、品质、根际土壤酶活性，改善根际微生物区系，降低黄萎病发病率和病情指数。使用EM菌剂效果最好，其次是枯草芽孢杆菌、木霉菌、丛枝菌根真菌。研究表明，在设施连作茄子黄萎病高发地区，可使用有效微生物制剂处理育苗基质和田间土壤，能显著降低茄子黄萎病发病率和病情指数，提高茄子产量和品质。 相似文献
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茄子黄萎病无公害防治技术 总被引：1，自引：0，他引：1
茄子黄萎病又称半边疯、黑心病、凋萎病,是危害茄子的重要病害.近年来,该病的发生呈逐年加重之势,一般年份发病率在40%～50%,严重年份发病率高达70%以上,给广大茄农造成巨大损失. 相似文献
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氮磷钾硼肥配施对青花菜养分吸收分配及产量和品质的影响 总被引：4，自引：0，他引：4
研究了不施肥处理,氮磷钾配施和增施硼肥对青花菜养分吸收分配及产量和品质的影响。结果表明,现蕾期至花球膨大期,青花菜对氮、磷、钾的吸收量最大,整个生长期对钾的吸收最多,氮次之,磷最少。氮磷钾主要分配在叶片中,现蕾后逐渐向花球转移,从现蕾到采收时,叶片中氮、磷、钾分配率分别降低了19.6%、10%和9.0%,花球中氮磷钾分配率分别提高了23.1%、15.9%和11.1%。不施氮、磷、钾肥显著降低了花球产量、维生素C含量和成品率,增施硼肥处理的花球成品率较氮磷钾肥处理提高了4.8%,不施氮肥和钾硫肥(K2SO4)显著降低了花球中的硫代葡萄糖苷含量。相关性分析表明,青花菜产量与植株内氮、钾积累量显著正相关,成品率与植株内磷营养显著正相关。 相似文献
12.
Geographical perspectives of space,time, and scale 总被引：24，自引：0，他引：24
Vernon Meentemeyer 《Landscape Ecology》1989,3(3-4):163-173
13.
Omid Khalifezadeh Koureh Mohammadreza Pourghayoumi Majid Majidian 《International Journal of Fruit Science》2019,19(1):1-12
The aim of this research was to determine the effect of three different fertilizing systems, including organic, conventional, and integrated ones, on the yield, fruit quality, antioxidant activity, and some phenolic compounds of white seedless grape. The study was carried out on several 6-year-old white seedless grapevine located in the Urmia Province (North-West Iran). The results showed that the fruit physical characteristics and yield were affected significantly by different fertilization systems. The highest yield was observed in the conventional fertilization, followed by organic and integrated systems. The leaf mineral contents were obviously dependent on the different fertilization used, whereas pH and titratable acidity were not affected. Based on our results, the highest values of antioxidant activity and total flavonoid were found in the organic and integrated fertilization systems, respectively. Also, the highest contents of total phenolic, catechin, and quercetin-3-galactoside were observed in the organic fertilization system. Overall, the highest nutritional quality and biochemical characteristics of white seedless grape were obtained in organic fertilization system, which improved antioxidant capacity by enhancing total phenolics, total flavonoids and valuable phenolic compounds. 相似文献
14.
Robert Rosen 《Landscape Ecology》1989,3(3-4):207-216
An exceptionally rich and colorful literature, drawn in almost equal parts from pure mathematics, from the sciences, and from the technologies, has grown up over the years, which bear in different ways on the topics under discussion. It is the intent of the present paper to survey this far-flung literature, point out some of the commonalities and interrelationships which underlie it, and briefly indicate how it has been and can be applied. To my knowledge, this kind of review has not been attempted before. 相似文献
15.
江汉平原是国家优质粮食、优质棉花和双低油菜重要生产基地,也是湖北省西瓜主产区。种植西瓜对增加农民收入、丰富市场、发展农村经济、提高土地利用率具有重要作用。江汉平原西瓜生产的突出特点是间作套种,早在20世纪70年代就推广了“麦／／瓜-稻”这种水旱、粮经作物配套种植的优化模式．并获得原荆州地区科技进步二等奖。由于西瓜间作套种提高了单位面积的经济效益、 相似文献
16.
Fruit cracking after rain limits the production of a number of crops, including some Ribes species. To gain a better understanding of the factors involved in cracking, fruit growth, deposition of the cuticular membrane (CM), water uptake and fruit cracking were studied in black currant (Ribes nigrum L. cv. Zema), gooseberry (Ribes uva-crispa L. cv. Rote Triumph), and jostaberry (Ribes nidigrolaria B. cv. Jostine). Fruit surface area and fresh mass increased continuously throughout development, whereas deposition of the CM was biphasic. CM mass per fruit increased rapidly up to 42, 41, and 49 days after full bloom (DAFB) in black currant, gooseberry, and jostaberry, respectively. Thereafter, CM mass per fruit remained constant in gooseberry and jostaberry or increased at a lower rate in black currant. The cessation of or reduced rate of CM deposition resulted in a decrease in CM mass per unit area in all berries. Elastic strain of the CM at maturity averaged 23.8% and 19.5% in gooseberry and jostaberry, respectively, and only 8.2% in black currant. Microcracks in the CM were observed first in gooseberry and jostaberry 64 DAFB, whereas there were no microcracks in black currant. Water uptake into mature detached berries was linear over 2 h of incubation. Rates of uptake were highest in gooseberry followed by black currant and jostaberry. Relative uptake was similar via the cut end of the pedicel (32.1%), the apex of the fruit (34.7%) and the fruit surface (33.2%). Rates of water uptake through the fruit surface were positively related to surface area. Average fruit water potential for black currant, gooseberry, and jostaberry was −2.14 ± 0.17, −1.24 ± 0.03, and −1.89 ± 0.20 MPa, while the permeability for osmotic water uptake was 7.7 ± 0.4 × 10−8, 5.2 ± 0.1 × 10−8, and 3.3 ± 0.3 × 10−8 m s−1. Incubating whole fruit in deionized water for 72 h resulted in more cracked jostaberries (94%) than black currants (74%) or gooseberries (50%). A comparison of our findings in Ribes berries with published data for the sweet cherry drupe revealed that the berries fitted the relationships established in sweet cherry among fruit growth, cuticle deposition, strain of the cuticle, microcracking, permeability for osmotic water uptake, frequency of stomata and cracking. The Ribes berries were less susceptible to cracking than sweet cherry. 相似文献
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盆景果树集"艺术欣赏与果实享用"于一身。文章重点阐述盆景果树的定义、发展史与现状、分类与特点、文化和经济的双重价值等内容。 相似文献
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中国''''99昆明世界园艺博览会蔬菜瓜果园 总被引：1，自引：0，他引：1
蔬菜瓜果园作为中国’99昆明世界园艺博览会六大专题展园之一 ,占地 4 90 0ｍ2 。园内以农舍草屋为中心 ,通过瓜架、篱笆、草亭及蔬菜瓜果栽培 ,构出一幅农家乐园式的田园风光。另外 ,通过集中展示中国蔬菜瓜果的科技生产水平 ,丰富的资源优势 ,色彩缤纷、新奇别致的蔬菜瓜果品种 ,来突出本次世博会的主题“人与自然 ,和谐发展———迈向 2 1世纪” ,从而展现“蔬菜瓜果园艺是人类赖以生存的重要食源和艺术”为主题思想的蔬菜瓜果园内涵。 蔬菜瓜果园位于世博园主入口世博大道南侧 ,与盆景园、药草园相邻。在总体布局、栽培上充分运用园… 相似文献
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AIM: To investigate the angiogenesis status,the expression of vascular endothelial growth factor (VEGF),angiopoietin-1 (ANG-1),angiopoietin-2 (ANG-2),thrombospondin-1 (TSP-1) in cholangiocellular carcinoma (CCC) and relationship with tumor angiogenesis,differentiation,invasion and metastasis.METHODS: 33 specimen of surgically resected CCC were investigated.Immunohistochemical staining of CD34,VEGF,ANG-1,ANG-2 and TSP-1 was carried out.RESULTS: The mean MVD was (87.2±52.6)/mm2.VEGF positive expression was found in 75.6% cases;ANG-1 positive expression was observed in 36% cases;ANG-2 positive was detected in 57.6% cases and 45.5% cases exhibited positive TSP-1 expression.VEGF and ANG-2 expressions were found to be associated with significant higher level of MVD (P<0.01 and P<0.05,respectively).TSP-1 expression was found to be associated with significant low level of MVD (P<0.01).Positive TSP-1 expression was also found to be associated with higher level of intrahepatic metastasis (46.7% vs 5.6%,P<0.05).CONCLUSION: Considerable angiogenesis compared to other solid tumors can be observed in CCC.VEGF and ANG-2 might play a proangiogenic role and TSP-1 may play an inhibitory role.Although TSP-1 may increase the intrahepatic metastasis of CCC,neither MVD levels nor the expression of VEGF,ANG-1,or ANG-2 is associated with tumor differentiation,invasion and metastasis. 相似文献