Bhuvaneshwari K, Singh Pawan Kumar
Center for Advanced Study in Botany, Banaras Hindu University (B.H.U.), Varanasi, 221005, India.
3 Biotech. 2015 Aug;5(4):523-529. doi: 10.1007/s13205-014-0251-8. Epub 2014 Sep 26.
The water fern Azolla harbors nitrogen-fixing cyanobacterium Anabaena azollae as symbiont in its dorsal leaves and is known as potent N fixer. Present investigation was carried out to study the influence of fresh Azolla when used as basal incorporation in soil and as dual cropped with rice variety Mahsoori separately and together with and without chemical nitrogen fertilizer in pots kept under net house conditions. Results showed that use of Azolla as basal or dual or basal plus dual influenced the rice crop positively where use of fern as basal plus dual was superior and served the nitrogen requirement of rice. There was marked increase in plant height, number of effective tillers, dry mass and nitrogen content of rice plants with the use of Azolla and N-fertilizers alone and other combinations. The use of Azolla also increased organic matter and potassium contents of the soil.
满江红这种水生蕨类植物在其背面叶片中寄居着固氮蓝藻——满江红鱼腥藻，是一种强大的固氮植物。本研究旨在探讨在网室条件下的盆栽中，将新鲜满江红分别单独作为基肥施入土壤、与水稻品种Mahsoori间作，以及在有和没有化学氮肥的情况下同时进行这两种操作时，对水稻的影响。结果表明，将满江红用作基肥、间作或基肥加间作均对水稻作物有积极影响，其中将满江红用作基肥加间作效果最佳，满足了水稻的氮需求。单独使用满江红、氮肥以及其他组合，都显著增加了水稻植株的株高、有效分蘖数、干质量和氮含量。满江红的使用还增加了土壤中的有机质和钾含量。
