植物营养与肥料学报2016，Vol.22Issue(1)：263-268,6.DOI:10.11674/zwyf.14312
不同种植密度下丛枝菌根真菌对玉米磷吸收的影响
Effect of arbuscular mycorrhizal fungi on P uptake of maize (Zea mays L.) under different growing density
摘要
Abstract
[Objectives] Improving soil P utilization efficiency for crop by using arbuscular mycorrhizal symbiosis is one of effective ways to solve contradiction between supply and demand of phosphorus resource in the crop production. However, studies on mycorrhizal colonization and phosphorus uptake of maize with different growing density in field have been less concerned. [Methods] A field experiment was conducted with two planting densities (5 ×104 plants/ hm2 and 9 ×104 plants/ hm2 ) of maize (Zea mays L. ). PVC pipes were inserted around maize roots, and phosphorus depletion and hyphae length density of soil in the PVC compartment were determined to test effects of arbuscular mycorrhizal fungi on phosphorus uptake of maize. [Results] At the V6 stage, the Olsen-P depletion was significantly reduced when the planting density was increased, while the increment of the shoot P content ( P absorption efficiency) was up to 20% . With the increase of the planting density, the extraradical hyphae length density in the rhizosphere was decreased by 4% at the V6 stage, while the hyphae density in the bulk soil was increased by 37% . The contribution of extraradical hyphae to Olsen-P depletion was significantly increased by 22% under the higher planting density condition. [ Conclusions] These results indicated that P uptake of maize was dependent on AM symbiosis when the planting density was increased, because of the mycorrhizal colonization, extraradical hyphae density and P uptake were significantly enhanced, comparing to the low planting density.关键词
玉米/有效磷/丛枝菌根真菌/种植密度Key words
maize/Olsen-P/arbuscular mycorrhizal fungi/planting density分类
农业科技引用本文复制引用
张晓飞,李伟,杨珊,姚国庆,朱文东,肖京京,郑婷,曹宁,冯固..不同种植密度下丛枝菌根真菌对玉米磷吸收的影响[J].植物营养与肥料学报,2016,22(1):263-268,6.基金项目
国家自然科学基金(31101606) （31101606）
教育部博士点基金(20120008130001)资助。 （20120008130001）
