共查询到18条相似文献,搜索用时 203 毫秒
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西双版纳勐捧农场橡胶树的营养状况与施肥徐杜生(云南省国营勐捧农场试验站勐腊666307)不施肥,橡胶树生长和产胶所需的养分消耗得不到补充,致使胶树生势逐渐衰弱老化,产胶能力下降。施肥不当,不仅浪费肥料,还会导致橡胶树的营养失调,长期以往,造成恶性循环... 相似文献
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云南省橡胶树专用肥料的研制及其施用效果的研究 总被引:2,自引:2,他引:0
云南省橡胶树专用肥料的研制及其施用效果的研究严世孝(云南省热带作物科学研究所)前言橡胶树是多年生经济作物,要促使胶树速生.高产,延长经济寿命,合理施肥是一项重要的措施。合理施肥,必须根据土壤肥力状况,胶树本身的营养特性及肥料性质有针对性地施用,才能发... 相似文献
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<正> 施肥不当会导致橡胶树的营养失调,不仅影响生长和产量,也会造成肥料和劳力的浪费,增加生产成本,降低经营效益。云南植胶已有30多年,但合理施肥问题并没有完全解决,迄今的施肥推荐还带有习惯性的平均施肥方案。为了适应当前生产上的要求,我们根据长期的肥料试验结果和橡胶树的营养诊断以及土壤肥力状况,拟就西双版纳地区开割胶树的施肥问题提出如下意见,供商榷。一、西双版纳植胶土壤概况西双版纳热区自然资源极为丰富,是我省天然橡胶生产的重点开发区。本区宜 相似文献
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云南植胶近50年,长期以来橡胶树施肥多采用以氮肥为主的单质肥料。80年代以后,复合肥施用比例逐年增加,但由于肥料类型较单一,营养元素配比。不尽适合不同胶园的实际需求,因此胶园施肥仍处于一种盲目状态。为了解决科学施肥的问题,我场于1997~1999年应用橡胶树营养诊断技术,研制对症配方肥料并进行胶树施肥试验,取得了显著效果。现将3年试验结果总结如下:1 材料与方法1.1 试验材料试验设在勐捧农场四分场的八、九队,六分场的三、七队,八分场的八、十队,试验面积495.8 hm~2,橡胶树161 560株。试验品系为RRIM600、GT1、云研2… 相似文献
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<正> 橡胶树矿物营养诊断指导施肥技术是通过测定胶园土壤养分和叶片营养水平为依据来制定的合理施肥方案。据国内外研究认为,这是目前对胶树施肥较先进的技术。我所从70年代开始进行了系统的研究,积累了大量的科学依据。为了在云南推广应用该项技术,1987—1989年在《橡胶树高产综合技术》项目中进行大面积开发性的应用研究,取得了明显效果。现总结如下。 相似文献
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S. Aleixo A. C. Gama-Rodrigues M. G. Costa M. V. S. Sales E. F. Gama-Rodrigues J. R. B. Marques 《Agroforestry Systems》2017,91(3):423-437
Little is known about the phosphorus (P) fractions and P lability of agroforest soils in tropical regions, particularly those of cacao (Theobroma cacao L.) agroforests. We hypothesized that the effect of P fertilization on the distribution of P fractions in the soil based on the source-sink relationship differs for different cacao agroforestry systems. The cacao agroforestry systems studied were the following: open cacao-cabruca, closed cacao-cabruca, cacao + erythrina, mixed cacao + rubber tree, and cacao + rubber tree intercropping. A natural forest and an unfertilized pasture were used as reference systems. The P fractions were determined using the Hedley sequential extraction method, and the P transformation processes were evaluated via structural equation modeling. The impact of low P fertilizer input on the P fractions varied according to the specific environmental conditions of each cacao production system. Consequently, there was high dissimilarity among all of the cacao sites. In all of the cacao agroforestry systems, there was an increase in inorganic P (Pi), especially the labile fraction (resin-Pi and NaHCO3-Pi), but organic P (Po) increased only in the cacao + erythrina system and in the rubber tree planting row of the cacao + rubber tree intercropping system. As a result, the fitted structural models indicated that the inter-relationships of the geochemical processes were more important for determining the P availability than the biological processes. However, the Po concentrations and relative proportion were high in all of the cacao agroforestry systems, thereby revealing the high potential of supplying P to plants via the mineralization process in the eventual removal of mineral fertilization. 相似文献
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海南东部垦区部分农场橡胶树叶片营养元素含量分析 总被引:2,自引:0,他引:2
对海南省东部部分农场PR107和RRIM600不同产量水平的成龄胶园叶片养分分别进行了研究,结果表明,两个品种的高、中、低产胶园叶片养分状况都存有明显差异,PR107品种高产胶园的全氮和全磷显著高于中、低产胶园;RRIM600不同产量水平的胶园中全钾和钙存在显著差异。高产胶园中,PR107和RRIM600品种间叶片养分含量存在显著差异,因此,要因树施肥,合理配比,达到增产的目的。 相似文献
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橡胶树胶乳生理诊断法是一批法国学者于20世纪80年代发展起来的,用于判断胶树代谢与健康状况的方法。在研究了巴西橡胶树胶乳的各种成分在胶树中的生理功能及其变化规律,以及这些成分与胶树产量之间的相关性后,可以将无性系划分为不同的代谢类型,并根据不同的代谢类型,安排不同的采胶方法;同时也可以根据随机抽样理论找到这些成分的标准参考值,用来判断开割胶树的健康状况,以指导采胶生产。现在胶乳生理诊断主要用于无性系代谢类型判断与采胶强度判断。 相似文献
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更新橡胶林地套种菠萝提高土地利用率和经济效益 总被引:1,自引:0,他引:1
西双版纳景洪农场四分场实施利用橡胶树更新林地套种菠萝发展非公经济的项目,大大提高了农场现有土地利用率和增加经济收入,提高了职工发展经济的积极性,有效缓解职工收入偏低,农场发展困难的矛盾。 相似文献
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D. C. Lawrence 《Agroforestry Systems》1996,34(1):83-100
The goal of this study was to assess the potential of small-holder rubber cultivation in agroforestry gardens to fulfill simultaneously the goals of conservation and sustainable rural development. I examined the structure and species composition of trees in 11 rubber gardens in West Kalimantan, Indonesia, using a single 0.10 ha plot per garden. Although 41 distinct morphotypes were encountered, rubber (Hevea brasiliensis) dominated the sample of 370 trees. Richness within plots varied (3–15 morphotypes), as did the predominance of rubber (24–97% of all basal area, 24–91% of all individuals). The importance of rubber within a garden was significantly negatively correlated with the number of morphotypes present. This result suggests that tree diversity may limit potential productivity of rubber gardens. Thus, small-holders may not be willing to maintain diversity at the scale of a single garden. Although species-accumulation curves indicate that substantial tree diversity may exist across all rubber holdings, diversity is likely to be lost from the system if individual owners reduce species richness in their gardens. Rubber agroforestry as currently practiced in West Kalimantan is not an ideal model for matching rural development needs with the achievement of conservation goals. Other models, such as tengkawang- and durian-based fruit gardens, do exist in Kalimantan and elsewhere, and should be evaluated for incorporation into policy and development strategies. 相似文献
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国内外橡胶树种质资源收集保存及其研究进展 总被引:3,自引:0,他引:3
对世界各主要植胶国橡胶树种质资源的收集与保存、鉴定评价与利用、共享与保护现状,和分子标记技术在橡胶树种质资源鉴定评价中的运用作了综述;同时根据我国橡胶树种质资源研究与国外的差距和存在的主要问题,提出关于提高我国橡胶树种质资源保存和研究水平的建议及近期的主要研究内容。 相似文献