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VA菌根是土壤真菌与植物根形成的共生体系,大多数植物能受VA菌根真菌的感染。菌根的形成可明显地改善寄主植物对土壤中磷、锌、铜、钙等矿质营养元素的吸收,尤其在缺磷土壤中效果更加显著。Mosse接种VA菌根真菌曾使苹果苗的吸磷量比不接种的对照高21倍。用菌根真菌和根瘤菌同时接种豆科植物,也显著提高了固氮酶活性。国内外针对特定寄主植物,如:柑桔、烟草等进行了VA菌根真菌优良菌种的筛选。美国把分离的VA菌根真菌用于柑桔生产明显提高了产量,降低了磷肥施用量,从而提高了经济效益。棉花是我国的主要经济作物之一。由于大部分棉区土壤不同程度缺磷,限制了棉花的产量和品质的提高。本研究试图分离和筛选出棉花VA菌根真菌的优良菌株,通过活体寄主植物大量繁殖,在制备营养钵时进行人工接种,促进棉苗生长,以提高棉花的产量和质盈。本文仅报道VA菌根对棉苗生长的影响。
VA mycorrhiza is a symbiotic system formed by soil fungi and plant roots. Most plants are infected with VA mycorrhizal fungi. Mycorrhizal formation can significantly improve the absorption of phosphorus, zinc, copper, calcium and other mineral nutrients in the host plants, especially in the phosphorus-deficient soil. Mosse inoculation of VA mycorrhizal fungi had 21 times more phosphorus uptake in applesaurants than non-inoculated controls. Inoculation of leguminous plants with mycorrhizal fungi and rhizobia also significantly increased nitrogenase activity. At home and abroad for specific host plants, such as: orange, tobacco and other VA mycorrhizal fungi screening of good strains. The United States to separate the VA mycorrhizal fungi citrus production significantly increased production, reducing the amount of phosphate fertilizer, thereby increasing economic efficiency. Cotton is one of China’s major cash crops. Due to the lack of phosphorus in most cotton soils, the yield and quality of cotton are limited. In this study, we tried to isolate and screen out the excellent strains of cotton mycorrhizal fungi. Through the large-scale propagation of living host plants, artificial inoculation was conducted in the preparation of nutritional bowls to promote the growth of cotton seedlings and improve the yield and quality of cotton. This article reports only the effects of VA mycorrhiza on cotton seedling growth.