Growth responses of several plant species to mycorrhizae in a soil of moderate P-fertility
Growth responses of several plant species to mycorrhizae in a soil of moderate P-fertility
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DOI：
10.1007/bf02374781
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发表时间：
1983-06
期刊：
影响因子：
4.9
通讯作者：
C. Plenchette;J. Fortin;V. Furlan
中科院分区：
文献类型：
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作者：
C. Plenchette;J. Fortin;V. Furlan
在大田条件下，比较了20种植物在甲基溴熏蒸和未熏蒸土壤中的生长情况。未熏蒸土壤具有野生菌根区系，速效磷含量为100μg/g。不向土壤添加磷，但熏蒸和未熏蒸的地块都得到了100 kg/hm2的N−NH4N3和100 kg/hm2的K−KCl.根据植物的生长反应，可以区分三类植物。I组的植株为菌根，在未熏蒸的土壤中比在熏蒸土壤中生长更好。这个类群是最重要的，包括16种植物。I组植物在土壤熏蒸后的矮化主要归因于菌根的破坏。来自第二组(燕麦和小麦)的植物在未熏蒸和熏蒸土壤中生长得同样好。对于非熏蒸小区中的菌根植物，土壤中的磷含量足以生长，因此在没有菌根的情况下没有观察到发育迟缓。第III组(甘蓝和甜菜)的植株在熏蒸土壤中的生长情况好于未熏蒸土壤。它们在熏蒸土壤中的较好生长初步归因于土传病原体的破坏。提出了一种新的菌根依存度计算方法，即相对田间菌根依存度指数(RFMD)。还建议首字母缩写RFMD接收一个上标，以μg/g表示土壤中有效磷的数量。胡萝卜的RFMD100指数最高(99.2%)，但其他正常生长对磷需求较高的植物的RFMD100指数范围较大。
The growth of twenty plant species was compared under field conditions in a methyl bromide fumigated and non-fumigated soil. The non-fumigated soil had a wild endomycorrhizal flora and contained 100 μg/g of available phosphorus. No phosphorus was added to the soil but both fumigated and non-fumigated plots received a basal fertilization of 100 kg/ha N−NH4NO3and 100 kg/ha K−KCl. Based on plant growth responses, three groups of plants were distinguishable. Plants from group I were mycorrhizal and had better growth in non-fumigated than in the fumigated soil. This group was the most important, including sixteen plant species. Stunting of plants from group I following soil fumigation was mainly attribuable to the destruction of mycorrhizae. Plants from group II (oat and wheat) grew equally well in non-fumigated and fumigated soils. For these plants which were mycorrhizal in the non-fumigated plots, the P-content of the soil was sufficient for growth and therefore no stunting was observed in the absence of mycorrhizae. Plants from group III (cabbage and garden beet) grew better in fumigated than in non-fumigated soil. Their better growth in fumigated soil was tentatively attributed to the destruction of soil-borne pathogens. They did not form mycorrhizae in non-fumigated soil.A new method of calculating mycorrhizal dependency is proposed, and the value calculated was named relative field mycorrhizal dependency (RFMD) index. It is also proposed that the acronym RFMD receive a superscript representing in μg/g the quantity of available P in the soil. Carrot with its characteristic root systems had the highest RFMD100index (99.2%), but other plants with high phosphorus requirements for normal growth had a wide range of RFMD100index values.