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首页> 外文期刊>Biotechnologie, Agronomie Societe et Environnement >Improving growth of shea butter tree (Vitellaria paradoxa C.F.Gaertn.) seedlings using mineral N, P and arbuscular mycorrhizal (AM) fungi.
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Improving growth of shea butter tree (Vitellaria paradoxa C.F.Gaertn.) seedlings using mineral N, P and arbuscular mycorrhizal (AM) fungi.

机译：使用矿物质N，P和丛枝菌根（AM）真菌改善乳木果油树（Viellaaria paradoxa C.F. Gaertn。）幼苗的生长。

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摘要

For the successful cultivation of most undomesticated fruit trees such as shea butter tree (Vitellaria paradoxa C.F.Gaertn.), there is a need to identify their nutrient requirements and optimal growth conditions. Responses of shea seedlings to combined N and P fertilization, and to inoculation with arbuscular mycorrhizal (AM) fungi was investigated. Six months old Shea seedlings were transplanted into pots and grown for six months using a sterile nutrient-deficient soil. The seedlings were inoculated with the AM fungus Glomus intraradices Schenk & Smith. The fertilization treatments consisted of a factorial combination of three levels of N supplied as NH4NO3-N and P supplied as Ca(H2PO4)2. Fertilization stimulated plant height, collar diameter and dry weights (DWs) compared with non-fertilized treatments. These improvements were associated with an increase in total shoot N and C uptake (33% increase) whereas P and K contents were not affected. There was significant N x P interaction on DWs and total shoot N and C contents, suggesting that seedling N responses were influenced by P rates. Consistent N responses in DWs, and total shoot N and C uptake were significant at the lowest P rate. P increases promoted growth and total shoot nutrient contents in low N-treated seedlings, while reducing growth in higher N rates. The combined application of medium and high rates of N and P fertilizers showed relatively low impact on seedling growth presumably because of suboptimal N:P ratios. Mycorrhizal root colonization was generally low (<=12%) and was not affected by any of the treatments. There was also no response to inoculation with AM fungi probably because the established mycorrhizal association was ineffective. The potential use of both mineral fertilizers and AM fungi to promote growth performance of shea seedlings are discussed.
机译：为了成功地种植大多数未驯化的果树，如乳木果油树（Viellaaria paradoxa C.F.Gaertn。），需要确定其营养需求和最佳生长条件。研究了乳木果幼苗对氮和磷联合施肥以及接种丛枝菌根（AM）真菌的反应。将六个月大的乳木果幼苗移植到花盆中，并使用无菌的营养缺乏的土壤生长六个月。用AM真菌 Glomus intraradices Schenk＆Smith接种幼苗。施肥处理由三种水平的因子结合组成，分别以N 4 NO 3 -N和Ca（H 2 PO 4 ） 2 。与未施肥处理相比，施肥刺激了植株的身高，衣领直径和干重（DWs）。这些改善与总苗N和C吸收量增加（增加33％）有关，而P和K含量不受影响。 DWs上的N x P有显着的交互作用，而茎中N和C的总含量也较高，表明幼苗的N反应受P比率的影响。在最低的P速率下，DWs中一致的N反应以及总的N和C吸收显着。低氮处理的幼苗中磷的增加促进了生长和总苗养分含量的增加，而高氮水平下的磷却降低了其生长。 N和P肥料的中，高比例肥料的组合施用对苗木生长的影响相对较低，据推测是由于N：P比例不理想。菌根根定植一般较低（<= 12％），不受任何治疗的影响。接种AM真菌也没有反应，可能是因为已建立的菌根结合无效。讨论了矿物肥料和AM真菌促进乳木果幼苗生长性能的潜在用途。

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