VA 菌根真菌对石刁柏生长的影响

EFFECT OF VA MYCORRHIZAL INOCULATION ON GROWTH OF ASPARAGUS SEEDLINGS

在不灭菌的黄淮海沙质黄潮土和壤质黄潮土中,对石刁柏(Asparagus officinalis L.)进行了 VA 菌根菌接种试验。结果表明:接种 VA 菌根后,提高了它对石刁柏的侵染率,并明显地促进了石刁柏的生长。氮、磷、钾配比为1:0:1时,接种可获得与1:1:1和1:2:1者相一致的产量;在全量施肥、施肥量减半和不施肥处理中,施肥量减半最有利于 VA 菌根的侵染,植株地上、地下部分的生长和磷量的吸收也优于其它处理。这说明接种 VA 菌根能提高植物对土壤磷素的吸收利用,从而节省了磷肥的用量。

Experiments on asparagus (Asparagus officinalis L.) inoculated with VA mycorrhizal fungi were conducted under two fluvo-aquatic phosphorus deficient soils. This study was to examine the growth response of VA mycorrhizae and fertilizer effects on the growth of mycorrhizal and non-mycorrhizal asparagus seedlings in pots and under field conditions. Inoculation with VA mycorrhizal fungi significantly increased mycorrhizal infection and enhanced seedling growth. In .treatments of fertilization by different batches of NPK or by different amount of application it was shown that phosphorus was most favourable to VAM activity. Both the prevalance of my- corrhizal infection and the dry weight of seedlings in treatment with NPK in l:O:l was similar to that in 1:1:1 and 1:2:1 after inoculation. Further more the prevalance of infection, plant gro- wth and P content in the treatment of 1/2 an amount of NPK in 1:1:1 were even higer than ^+hose in full amount of NPK and in non-fertilization. It is indicated that phosphorus uptake and plant growth benefit greatly by mycorrhizal inoculation. Mycorrhizal plant requires only about half as much phosphorus to achieve maximum growth as the uninoculated plants.