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营养膜无土栽培技术的研究 总被引:1,自引:1,他引:0
丁朝华;杨桂芳;於炳 《武汉植物学研究》1989,7(3):285-292
试验研究着重于设备、肥料和配方,产量效益、经济成本等。采用控制和调节pH值、电导度、氧气和设备等措施,使黄瓜亩产量达6861.5公斤;番茄因品种不同而有差异,早丰番茄品种达8361.1公斤。番茄每公斤成本0.29元。植物群体高大,根系发达,结果早,个体大,质量好。证明该技术操作容易,管理简单,产量高,有明显的经济效益。 相似文献
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魔芋无土栽培营养液配方研究初报 总被引:2,自引:0,他引:2
分别采用全MS、1/2MS、1/5MS、1/10MS(含大量元素、微量元素和铁盐)、1/10MS大量元素营养液(不含微量元素和铁盐)定期浇灌用蛭石栽培的不同级别的魔芋,前50d生长状况没有差异,50~80d以1/2MS~1/10MS营养液为佳,80~110d时1/5MS~1/10MS生长较好;魔芋在缺乏微量元素的营养液中后期生长不良,提前倒苗;产量分析结果表明:35g以上的种芋以1/2MS最高,35g以下的种芋以1/10MS最高,魔芋的耐盐浓度在2.25%。以下,高盐浓度对块茎的形成有毒害作用,造成产量大幅度下降,添加微量元素和铁有较好的增产作用。 相似文献
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魔芋无土栽培营养液配方研究初报 总被引:6,自引:2,他引:4
分别采用全MS、1/2MS、1/5MS、1/10MS(含大量元素、微量元素和铁盐)、1/10MS大量元素营养液(不含微量元素和铁盐)定期浇灌用蛭石栽培的不同级别的魔芋,前50d生长状况没有差异,50-80d以1/2MS-1/10MS营养液为佳,80-110d时1-5MS-1/10MS生长较好;魔芋在缺乏微量元素的营养液中后期生长不良,提前倒苗;产量分析结果表明:35g以上的种芋以1/2MS最高,35g以下的种芋以1/10MS最高,魔芋的耐盐浓度在2.25‰以下,高盐浓度对块茎的形成有毒害作用,造成产量大幅度下降,添加微量元素和铁有较好的增产作用。 相似文献
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无土栽培和生物技术是当今对农业生产上影响较大、引起人们普遍关注的高新技术,它们的特特点是在于摆脱了传统的一贯做法。无土栽培的最大特点是可合理地调节作物生长的根际环境,结合地上部设施环境的调控,可以完全摆脱自然条件的影响,实现农业的工厂化生产。 相似文献
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(二)无土栽培基质的选用在无土栽培中,基质是一种用于固定作物,提供根系营养的基础物质。要根据不同的栽培方式采用不同的基质,如设备与技术条件较差时,可采用槽栽或盆栽,选用砂子或蛭石作基质;如用袋培,可选用锯末或草炭加砂子的混合基质;在滴灌设备好的条件下,可采用岩棉作基质。此外还要考虑基质资源广泛充足,价格便宜,尽可能使无土栽培发挥最大的经济效益。 相似文献
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以150g左右、健壮的170只中华鳖为试验动物,随机分为17个组(其中1个组为“对照组)。以饵料能量、蛋白质为试验因素,采用2因子5水平回归正交旋转组合设计,得到9个试验饵料配方及其营养组合,进行60d饲养试验。试验表明,第9组鳖和第10~16组鳖平均体增重最高为2.22g/d,能量(GE)、蛋白质(CP)、脂肪(EE)和氨基酸(AA)沉积率分别达到36.27%、56.48%、55.06%和43.66%。试验条件下鳖体内营养物质沉积率与饵料配方营养水平及其组合有密切相关关系,9号饵料配方、营养水平及其组合比较适宜于生长期鳖的需要。
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In southern China, many freshwater ecosystems, including lakes, rivers and reservoirs, are eutrophic. The nutrient loading coupled with year-round warm weather favors the growth of cyanobacteria, several of which can produce cyanotoxins, especially the potent liver toxins called microcystins, which are often detected in eutrophic drinking water sources. For purifying raw water used as source of drinking water treatment plants, an aquatic vegetable bed (AVB) experiment had been carried out in a hypertrophic waterfront of Lake Taihu, China, since October 2002. AVB was a simplification of the nutrient film technique (NFT) used to produce vegetables, which requires large quantities of water and nutrients. The average removal rates of total microcystin-RR and microcystin-LR were 63.0% and 66.7%, respectively. This study indicated that Ipomoea aquatica was able to absorb microcystins by using enzyme-linked immunosorbent assay (ELISA), and that the roots absorbed more toxins than leaves and stems. We used fluorescence in situ hybridization (FISH) to analyze the density of microcystin-degrading bacteria in AVB sediment. Two species of microcystin-degrading bacteria were detected, which indicated that microcystin bio-degradation processes did occur in AVB. Protozoa and metazoa were abundant in the rhizosphere. Aspidisca sp., Vorticella sp., Philodina sp., and Lecane sp. were the dominant species. The predation function of protozoa and metazoa had a positive effect on removal of cyanobacteria and microcystins. 相似文献
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Applications of high levels of MgSO4 resulted in reduced root colonization and sporulation by Glomus sp. (INVAM isolate FL329) with sweet potato and onion in aeroponic and sand culture, respectively. Onion shoot-Mg concentrations
were elevated when a nutrient solution containing 2.6 or 11.7 mm MgSO4 was applied. Magnesium application depressed tissue-Ca levels. With lower Ca in the tissue, colonization was reduced from
> 30% of root length to < 10%, and sporulation from > 1200 to ca. 200 spores per plant, 10 weeks after transplantation and
the start of nutrient application. These effects on colonization and sporulation were independent of changes in tissue-P concentration.
High Mg/low Ca tissue concentrations induced premature root senescence, which may have disrupted the mycorrhizal association.
Our results confirm the importance of Ca for the maintenance of a functioning mycorrhiza.
Accepted: 3 October 1997 相似文献
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应用15N同位素示踪技术,通过盆栽实验研究了香草醛和对羟基苯甲酸对杉木(Cunninghamia lanceolata)幼苗N素养分吸收、分配的影响,结果发现香草醛及其与对羟基苯甲酸的混合物(浓度比1∶1)明显抑制了杉木幼苗的生长和对15NO3-离子的吸收,10 mmol·L-1的香草醛使杉木幼苗根、茎、叶生物量分别下降了25.3%、13.5%、5.7%,15N吸收量分别减少了38.5%、48.1%、46.5%;10 mmol·L-1的混合物使杉木幼苗根、茎、叶生物量分别下降了33.5%、36.0%、21 相似文献
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