NODULATION BY FRANKIA INCREASES GROWTH OF CASUARINACEAE IN A NEW-ZEALAND HORTICULTURAL SOIL
NODULATION BY FRANKIA INCREASES GROWTH OF CASUARINACEAE IN A NEW-ZEALAND HORTICULTURAL SOIL
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DOI：
10.1080/01140671.1994.9513804
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发表时间：
1994-01-01
影响因子：
1.3
通讯作者：
BULLOCH, BT
中科院分区：
文献类型：
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作者：
BULLOCH, BT
木麻黄（Casuarina cunninghamiana）和木麻黄（C. glauca）在新西兰被广泛用于防护林，并具有其他实用潜力。它们的固氮共生体Frankia在新西兰土壤中并不自然存在。在Palmerston North附近的一处园艺品质的Manawatu粉砂壤土上种植了人工接种Frankia培养物HFPCcI3后结瘤的植株。6 ~ 8年后，植瘤树木的茎粗和茎高显著大于未植瘤树木（相当于增加16 ~ 61%的体积）。结瘤树的活力也较高。根系挖掘发现根瘤局限于原幼苗根系周围的盆栽介质残留区，没有证据表明法兰克菌通过土壤传播感染附近的根系。通过取食根在土壤中更广泛地利用Frankia接种物可能增加了木麻黄结瘤和随后的树木生长，但新西兰的土壤温度不适合木麻黄科植物结瘤和固氮。
Casuarina cunninghamiana and C. glauca are widely used for shelterbelts in New Zealand and have other utilitarian potential. Their nitrogen (N)-fixing Frankia symbiont does not occur naturally in New Zealand soils. Plants nodulated after artificial inoculation with Frankia culture HFPCcI3 were planted on a horticultural-quality Manawatu silt loam soil near Palmerston North. After 6-8 years, trees nodulated at planting were significantly larger in stem diameter and height (equivalent to 16-61% additional volume) over trees not nodulated at planting. Nodulated trees were also rated higher for vigour. Excavation of root systems revealed that nodules were confined to the residual zone of potting media around the original seedling root systems and there was no evidence of Frankia spreading through the soil to infect nearby roots. More widespread availability of Frankia inoculum in the soil being explored by feeder roots might have increased nodulation and subsequent tree growth, but New Zealand soil temperatures are suboptimal for Casuarinaceae nodulation and N fixation.