摘要
采用土培试验研究了水分胁迫条件下接种菌根对玉米生长发育、光合作用、养分吸收和水分利用的影响。结果表明:土壤干旱使植株地上部及根系的生长量比对照显著下降,植株的形态发育受到抑制;接种VA菌根菌的植株体内磷营养状况得到改善,提高了土壤磷的有效利用率。接种菌根减轻了水分胁迫对植株生长的抑制程度,提高了植株叶片光合强度,增加了干物质积累。试验结果表明,菌根可以改善植株的水分状况,使叶片相对含水量增加,复水试验表明菌根植物比非菌根植株从干旱逆境中恢复水分的速度要快得多,同时也提高了植株水分利用效率。
The paper studied on influence of VA mycorrhiza on maize plant growth, photosynthesis, nutrient absorption and water utilization under water stress with soil culture experiment. The results showed that plant biomass reduced and plant morphological characteristic restrained under water stress. Inoculated VA mycorrhizal fungi in the soil, plant phosphorus content improved and enhanced phosphorus efficient utilization from soil, reduced the restrain to drought , increased plant photosynthesis intensity and dry biomass. VA mycorrhiza also could improve plant water content and increase leaf relative water content. Mycorrhizal plant had higher recovered rate from drought than non ?mycorrhizal plant. They could increase water utilization efficient.
出处
《干旱地区农业研究》
CSCD
北大核心
2003年第2期7-12,共6页
Agricultural Research in the Arid Areas
基金
国家自然基金项目(40201051)
"十五"863计划(2002AA649270)
