Effect Of Zinc And Molybdenum On Yield Formation And Quality Of Summer Maize Under Water Adversity

To investigate the high-stable-yield cultivation of summer maizeand stress resistance of maize under water adversity(drought stress and waterloggingstress), with the zhengdan958as experimental materials, at the Henan AgriculturalUniversity Science and Technology Education Garden area, the effect Zn and Mo onthe leaf area, chlorophyll content, photosynthetic rate, leaf water content,above-ground dry matter content, dry matter translocation, grain filling process, yield,Zn and Mo content, grain N P K content, grain quality were studied in the summer of2012. The main results are as follows:1. The single application of Zn fertilizer, the single application of Mo fertilizer and thecombine application of Zn and Mo fertilizer can effectively increase improve thewater status and physiological characteristics of leaf. Under normal water supply,maximum leaf water content occurred at the combine application of Zn and Mofertilizer at the mid-stage of grain filling. Under drought stress, maximum leaf watercontent occurred at the single application of Zn fertilizer at the mid-stage of grainfilling. Under waterlogging stress, maximum leaf water content occurred at thecombine application of Zn and Mo fertilizer at the mid-stage of grain filling. Undernormal water supply, at the mid-stage of grain filling, maximum SPAD value occurredat the single application of Zn fertilizer, maximum leaf area occurred at the singleapplication of Mo fertilizer, maximum photosynthetic rate occurred at the combineapplication of Zn and Mo fertilizer. Under drought stress, at the mid-stage of grainfilling, maximum SPAD value and leaf area occurred at the single application of Znfertilizer, maximum photosynthetic rate occurred at the combine application of Zn andMo fertilizer. Under waterlogging stress, at the mid-stage of grain filling, maximumSPAD value and leaf area occurred at the combine application of Zn and Mo fertilizer,maximum photosynthetic rate occurred at the single application of Mo fertilizer.2. Under normal water supply, maximum the above-ground dry matter contentoccurred at the single application of Zn fertilizer. Under drought stress, maximum theabove-ground dry matter content occurred at the single application of Mo fertilizer.Under waterlogging stress, maximum the above-ground dry matter content occurred atthe combine application of Zn and Mo fertilizer. Under normal water supply, the drymatter translocation content and grain filling rate of single application of Zn fertilizer,single application of Mo fertilizer and combine application of Zn and Mo fertilizer were higher than the treatment without applying microelement fertilizer. Among them,maximum dry matter translocation content occurred at the single application of Znfertilizer. Under drought stress, the dry matter translocation content and grain fillingrate of single application of Zn fertilizer, single application of Mo fertilizer andcombine application of Zn and Mo fertilizer were higher than the treatment withoutapplying microelement fertilizer. Among them, maximum dry matter translocationcontent occurred at the single application of Mo fertilizer. Under waterlogging stress,the dry matter translocation content and grain filling rate of single application of Znfertilizer, single application of Mo fertilizer and combine application of Zn and Mofertilizer were higher than the treatment without applying microelement fertilizer.Among them, maximum dry matter translocation content occurred at the singleapplication of Mo fertilizer.3. Compared with the treatment without applying microelement fertilizer, undernormal water supply, single application of Zn fertilizer increased yield16.01%, singleapplication of Mo fertilizer increased yield20.93%, combine application of Zn andMo fertilizer increased yield6.15%. Compared with the treatment without applyingmicroelement fertilizer, under drought stress, single application of Zn fertilizerincreased yield7.02%, single application of Mo fertilizer increased yield16.84%,combine application of Zn and Mo fertilizer increased yield3.28%. Compared withthe treatment without applying microelement fertilizer, under waterlogging stress,single application of Zn fertilizer increased yield8.13%, single application of Mofertilizer increased yield1.32%, combine application of Zn and Mo fertilizerincreased yield11.39%.4. Under normal water supply, maximum N K Mo content of grain occurred at thesingle application of Mo fertilizer, maximum P content of grain occurred at thecombine application of Zn and Mo fertilizer, maximum Zn content of grain occurredat the single application of Zn fertilizer. Under drought stress, maximum N P Kcontent of grain occurred at the single application of Mo fertilizer, maximum Zncontent of grain occurred at the single application of Zn fertilizer, maximum Mocontent of grain occurred at the single application of Mo fertilizer. Underwaterlogging stress, maximum N P K content of grain occurred at the singleapplication of Mo fertilizer, maximum Zn and Mo content of grain occurred at thecombine application of Zn and Mo fertilizer. Under normal water supply, maximumZn and Mo content of leaf occurred at the combine application of Zn and Mo fertilizer. Under drought stress, maximum Zn and Mo content of grain occurred at the combineapplication of Zn and Mo fertilizer.Under waterlogging stress, maximum Zn contentof grain occurred at the single application of Zn fertilizer, maximum Mo content ofgrain occurred at the single application of Mo fertilizer.5. Under normal water supply, maximum crude protein content of grain occurred atthe single application of Mo fertilizer, maximum crude starch content of grainoccurred at the single application of Zn fertilizer, maximum crude fat and lysinecontent of grain occurred at the combine application of Zn and Mo fertilizer. Underdrought stress, maximum crude protein content of grain occurred at the singleapplication of Mo fertilizer, maximum crude starch and fat content of grain occurredat the the treatment without applying microelement fertilizer, maximum lysine contentof grain occurred at the combine application of Zn and Mo fertilizer. Underwaterlogging stress, maximum crude protein content of grain occurred at the singleapplication of Mo fertilizer, maximum crude starch and fat content of grain occurredat the single application of Zn fertilizer, maximum lysine content of grain occurred atthe combine application of Zn and Mo fertilizer. The best effect of increasing graincrude protein content were the single application of Mo fertilizer under different waterconditions(normal water supply, drought stress, waterlogging stress). The best effectof increasing grain lysine content were combine application of Zn and Mo fertilizerunder different water conditions (normal water supply, drought stress, waterloggingstress).