共查询到20条相似文献，搜索用时 187 毫秒
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随着社会的快速发展,对于蔬菜有机生态型和无土栽培技术的研究也越来越深入,从基质供肥特性和基质中营养元素、p H和EC的动态变化具体分析蔬菜有机生态型无土栽培营养生理、有机生态型无土栽培作物固态肥营养类型的研究、有机生态型无土栽培对环境、产品品质、食用安全和产量影响等的相关研究。 相似文献
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掌握蔬菜吸肥特点,进行科学施肥 总被引：1，自引：0，他引：1
掌握蔬菜吸肥特点，进行科学施肥１０００８１北京市农林科学院蔬菜研究中心吴多三实践证明，要获得蔬菜生产的高产、优质、高效的目标，科学施肥是一个重要措施，而只有掌握蔬菜作物的吸肥特点，才能做到科学施肥。１．蔬菜是喜肥多肥性作物蔬菜作物对养分吸收量比禾谷类... 相似文献
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为筛选适合辽宁蔬菜作物的育苗基质,对辽宁省应用相对较多的8种蔬菜育苗基质的效果进行集中统一评测。综合比较4种蔬菜秧苗的出苗期、出苗率和幼苗生长状况。试验结果表明:丹麦品氏基质和德国福洛佳基质表现最为突出,其次为富养基质、鑫叶牌蔬菜专用育苗基质、荷兰特利福基质、无土育苗营养基质、微生物蔬菜育苗基质和玉秀基质。 相似文献
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蔬菜喜肥,是多肥性作物。要保证蔬菜的正常生长,提高产量和品质,就必须施用肥料和喷洒农药。近年来,由于蔬菜生产中农药、肥料的不当使用,造成蔬菜产品中有害物质大量积累,严重影响到人类的身体健康。 相似文献
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无基质营养液育苗技术去掉了传统工厂化育苗技术中基质的使用，采用营养液栽培，通过播种纸和覆盖纸将幼苗地上部分固定支撑，根系完全生长在营养液中。营养液配比和浓度可以根据作物需求达到最优化和精确调控，从而创造了最适于幼苗生长的环境条件，做到了育苗环节的工厂化、节水、节肥，提高了育苗的整齐度和健壮度。该项技术适用于全国各地区番茄、黄瓜等多种蔬菜育苗应用。 相似文献
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不同钙、镁肥对蔬菜产量和品质的影响 总被引：16，自引：0，他引：16
在蔬菜作物上施用不同的钙、镁肥,其作用和效果不同,其中以硝酸钙和氢氧化钙对增加蔬菜产量和改善产品成分效果明显,能提高Ｖｃ和糖的含量,降低含酸量,增加矿质营养含量;其次是硫酸镁。而施用氯化钙则对蔬菜品质有降低的趋势。在供试的几种蔬菜中,钙、镁肥的效果果菜类比根菜类好。 相似文献
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《Scientia Horticulturae》2005,106(4):484-490
Oxygen deficiency has an immediate effect on both water and nutrient uptake, the yield of the whole plant under different soilless culture is affected. The oxygen level required for the respiration of the root system then becomes a limiting factor as much in soil culture as in soilless culture. The total area of soilless crops in SE Spain today is estimated to be about 5000 ha. The objective of this experiment was to study the effect of potassium peroxide as an oxygen generator on vegetable crops growing in commercial substrates and to determinate the supply fraction for its use. Bioassay was used to determinate the fraction of potassium peroxide needed. Three greenhouse experiments were conducted in soilless culture with perlite and rockwool. Sweet pepper, melon and cucumber crop were supplied with potassium peroxide through fertigation to increase the oxygen content for one day per week. There were treatments: one with (T1) and the other without potassium peroxide (T0) in the nutrient solution. Fertigation parameters, yield and its quality were measured. Bioassay suggested that one gram per litre is the best fraction to use in soilless culture. Yield of sweet pepper was about 20% higher for T1 than T0 and 15% for melon; there was no significant difference in cucumber plants. 相似文献
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阐述了福建省无土栽培技术在蔬菜和花卉生产上的研究进展及其利用现状,介绍了福建省蔬菜和花卉的无土栽培技术发展存在的问题,为福建省无土栽培技术发展及其利用提供了一些参考。 相似文献
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有机生态型无土栽培技术及其营养生理基础 总被引：107，自引：1，他引：106
以番茄为试材,介绍了应用消毒有机肥代替营养液的有机生态型无土栽培技术的方法与原理。1991～1994年的试验结果表明:与营养液栽培相比,有机生态型无土栽培方法可降低肥料成本、增加果实中还原糖和维生素C含量、降低有机酸含量;采用有机生态型无土栽培,在番茄的整个生长期间,基质中营养元素的供应水平与植株对营养元素的吸收要求一致,吸收氮、磷、钾的比例为N:P2O5:K2O=1:0.251:1.141;同时,有机生态型无土栽培对环境无污染。 相似文献
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《Scientia Horticulturae》2005,103(4):453-460
This industrial residue is the woody endocarp of the almond fruits. This material is normally incinerated or dumped without control. Almond shell used (100% pure) as growing media can be more ecologically-friendly and less expensive than traditional rockwool since it can be locally produced. Three commercially produced random samples of two different textures and two volumes (19 and 25 L) were evaluated as growing media for soilless production. Three experiments were conducted to evaluate the effects of volume and texture and to compare this substrate with rockwool in terms of yield and quality characteristics of fruits in melon and tomato culture. The physical, physico-chemical and chemical properties studied did not differ significantly between both textures. Tomato plants grown in almond shell residue used 21% less water compared to rockwool over the course of production. We found non-limiting in comparison to rockwool for melon and tomato crops in relation to fertigation parameters, water uptake and yield. Significant differences of yield were found when we used the big size, specially in melon crop where commercial yield and soluble solids of plants growing on 25 L bags was higher than that on small one. The results suggested that almond shells seem to be an acceptable growing media as rockwool substitute for soilless vegetable production. 相似文献
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充分湿润栽培与淹水栽培对设施土壤盐分影响的差异初探 总被引：5，自引：0，他引：5
为了比较充分湿润栽培与淹水栽培对设施土壤盐分迁移影响的差异,在相邻2 个大棚中一个充分湿润种植湿栽水芹,另一个淹水种植豆瓣菜,以10 cm 为单位分4 层分别取土,测定试验前后0～40 cm 各土层的土壤EC 值和主要离子含量的变化。结果表明：充分湿润栽培能明显降低0～30 cm 土层的总盐含量,且降幅高于淹水栽培;而30～40 cm 深层土壤盐分含量有所上升,表明下渗盐分部分滞留在深层土壤。充分湿润栽培处理作物吸收量小的离子均有较大幅度下渗,而主要养分离子NO3- 在作物根系主要吸收层反而上升,0～30 cm 土层K+ 的下降幅度明显小于淹水栽培处理,说明充分湿润栽培对作物吸收量较大的养分离子具有较好的保留作用。 相似文献