共查询到19条相似文献，搜索用时 875 毫秒
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在分析了软籽石榴经济价值及推广意义的基础上,结合大量的推广及种植经验,深入探讨了繁殖技术、栽培技术、,整形修剪及花果管理等重点的生产栽培技术,并进一步提出了推广中应遵循的原则及推广流程,对于从事软籽石榴丰产栽培技术研究和推广工作的人员具有重要的指导意义。 相似文献
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大红袍花椒因其生物学特性与其它品种不同,按普通花椒的栽培技术种植往往达不到丰产、稳产的指标。根据多年的研究与实践结果现总结出大红袍花椒规范化栽培技术。 相似文献
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大红袍茶椒因其生物学特性与其它品种不同，按普通花椒的栽培技术种植往往达不到丰产、稳定的指标。根据多年的研究与实践结果现总结出大红袍花椒规范化栽培技术。 相似文献
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Four shrub/tree species, Alchornea cordifolia, Pennisetum purpureum, Chromolaena odorata, and Calliandra calothyrsus were
evaluated for their potential contribution to soil fertility restoration after two years fallow. Standing biomass, root distribution,
nutrient content in the biomass, decomposition and nutrient release patterns, and association with mycorrhizae were the evaluation
parameters. Alchornea and Pennisetum produced thehighest above-ground biomass, 66 t and 54 t/ha respectively. Pennisetum had
more than 19 t/ha of root, 92% of which was in the 20 cm top soil. Alchornea had 74% of it roots in this soil layer, mostly
as coarse roots while Calliandra had a deeper root system. Alchornea fallow accumulated more N and Ca, and Pennisetum fallow,
more K than others, and mycorrhizae were mostly associated with Alchornea roots. The ranking of the different species for
the decomposition rate was: Chromolaena > Pennisetum > Calliandra = Alchornea. Also release of nutrients during decomposition
followed the order K > N > Ca. Alchornea and Pennisetum could be recommended as green manure species especially when high
quantities of material are needed for weed or erosion control. Calliandra and Chromolaena, because of the flush of nutrient
during early mass, loss can be used as mulch when the crop demand of nutrient is high. Alchornea decomposed slowly and therefore
could be used to improve Chromolaena mulch, thus contributing to the build up of soil organic N and providing both short-
and long-term nutrient release.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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Thomas Mathew B. Mohan Kumar K. V. Suresh Babu K. Umamaheswaran 《Agroforestry Systems》1992,17(3):205-218
The results of a field trial conducted at the Livestock Research Station, Thiruvazhamkunnu, Kerala to study the compatibility of different components in a silvo-pastoral system revealed that growth and yield of fodder species were significantly influenced by the tree components only after tree canopy formation. The fodder species such as Pennisetum purpureum Schum., Panicum maximum Jacq., Brachiaria ruziziensis Griseb. and Euchlaena mexicana Schrad. grown in association with Casuarina equisetifolia J. R. & G. Forst. and Ailanthus malabarica DC recorded comparatively higher forage yield even after canopy formation. However, forage crops grown in combination with Acacia auriculiformis A. Cunn. ex Benth. and Leucaena leucocephala (Lam.) de Wit. registered relatively lower values for growth and yield. Increased light infiltration into the understorey due to the cladophyllous canopy can be attributed as reason for the higher fodder productivity under Casuarina. Due to the combination of crown size and shape, tree height and spacing the amount of light intercepted by Ailanthus also was very low. Among the four multi-purpose trees used, Acacia recorded the maximum growth rate followed by Casuarina, Ailanthus and Leucaena. Forage productivity of the four species was in the order: Pennisetum purpureum > Panicum maximum > Brachiaria ruziziensis > Euchlaena mexicana. Casuarina with Pennisetum/ Panicm were found to be optimal tree — forage combinations for silvo-pastoral systems. 相似文献
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对临沂市的观赏草资源进行调查,发现共有观赏草35种,隶属于8个科23属,利用灰色关联分析法,对35种观赏草在临沂市的生长状况和观赏价值进行了综合评价。结果表明:35种观赏草中有25种与理想种的关联度在0.6以上;综合评价较高的观赏草有狼尾草(Pennisetum alopecuroides)、斑叶芒(Miscanthus sinensis‘Zebrinus’)、粉黛乱子草(Muhlenbergia capillaris)和蓝羊茅(Festuca glauca)等8种,与理想种的关联度达0.7以上,可以在临沂推广应用。 相似文献
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紫椴种子萌发抑制物的研究 总被引：2，自引：0，他引：2
选取饱满的紫椴种子为研究材料,分别用不同浓度的水提取液和甲醇提取液处理白菜种子,48h后观察白菜种子的萌发情况,结果表明：随着水提液浓度的增加,白菜种子的萌发率逐渐降低;随着甲醇提取液浓度的增长,白菜种子的萌发率迅速下降至消失,而经过了80℃减压浓缩处理后的甲醇溶液可以使白菜种子萌发,且萌发率与蒸馏水为对照的相差很小,从而表明紫椴种子中存在种子萌发的抑制物质。 相似文献
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E. S. Namikoye G. M. Kariuki Z. M. Kinyua M. W. Githendu M. Kasina 《East African Agricultural and Forestry Journal》2017,82(2-4):246-260
Maize Lethal Necrosis Disease (MLND) has emerged as a great threat to maize production in East Africa. It is caused by a synergistic infection of maize by sugarcane mosaic virus (SCMV) and maize chlorotic mottle virus (MCMV). This study was carried out in Bomet County, Kenya, to determine the potential of various cropping systems to manage vectors of MLND–causing viruses. Plots measuring 7.5 m × 5.25 m were planted with maize (Zea mays L.) intercropped or bordered by elephant grass (Pennisetum purpureum Schumach.), coriander (Coriandrum sativum L.), pearl millet (Pennisetum glaucum (L.) R. Br.) and Gadam sorghum (Sorghum bicolour (L.) Moench). Maize monoculture was used as a control treatment; the nine treatments were arranged in a randomized complete block design and replicated four times for two seasons (December 2014 to April 2015 and April 2015 to September 2015). Data on corn thrips and corn leaf aphid infestation, MLND severity and incidence, MCMV and SCMV viral load, and yield were recorded. The sorghum border was the only companion crop that tested positive for MCMV and none tested positive for SCMV. Maize intercropped with elephant grass had significantly (P?<?0.01) the least incidence of disease. However, this treatment produced significantly lower yields (P?<?0.01). Coriander was the only companion plant most preferred by both corn thrips and corn leaf aphids (P?<?0.001). Maize from all cropping systems tested positive for MCMV (P?<?0.001) while maize grown with coriander tested negative for SCMV (P?<?0.001). Yields from plots surrounded by sorghum and coriander were significantly similar to those from maize monoculture plots. These findings suggest that maize should be intercropped with coriander due to its potential to trap corn leaf aphids and protect maize from SCMV. In addition maize should be grown surrounded by a sorghum border to maximize yield in areas where MLND is prevalent. 相似文献