Mineral culture material capable of blocking-up adsorption of heavy metal by mushroom

Abstract

The invention discloses a mineral culture material which can prevent champignon from absorbing heavy metal and consists of clinoptilolite power with the weight percentage of 50 to 89 percent, limestone powder or gypsum powder with the weight percentage of 9 to 42 percent and magnesium sulfate with the weight percentage of 2 to 8 percent. The invention reduces the content of heavy metal in the cultivated champignon to 10 to 50 percent, which is beneficial for improving the quality and safety of champignon and greatly reducing the heavy metal overweighting rate in champignon. The invention avoids adding sugar, increases the fixation property, ventilation property, water retention property and the function of adjusting the pH value, reduces the occasions of mushroom-stick rotten and damage by disease and insect at high-temperature over-summer period, prolongs the fruiting period, raising the conversion rate of culture material, raises the champignon-stick yield by 3 to 5 percent and increases the yield quantity of champignon by 5 to 8 percent. The invention can provide calcium, magnesium and a plurality of mineral trace elements necessary for champignon growth, has the function of evenly providing nitrogen and regulating nutrient delivery speed, reduces the occurring of deformed champignon and head-damped champignons and raises the high-quality champignon proportion by 8 to 15 percent.

Description

technical field [0001] The invention belongs to the technical field of edible fungus cultivation, and relates to the formula of edible fungus culture materials, in particular to a mineral culture material that can block the absorption of heavy metals by shiitake mushrooms. The content of harmful heavy metals in shiitake mushrooms can be reduced when the shiitake mushrooms are cultivated. Background technique [0002] Because shiitake mushrooms have a certain enrichment or biotransformation effect on heavy metal ions, regular consumption can enter the human body through the food chain, thereby affecting the health of eaters. Therefore cadmium, arsenic, mercury, lead and their compounds are key harmful pollutants in the quality and safety control of shiitake mushrooms. my country’s relevant national standards and industry standards have set strict limit requirements for heavy metals in shiitake mushrooms, such as "NY 5095-2002 Pollution-free Food Shiitake Mushrooms "Regulates ...

AI Technical Summary

Problems solved by technology

These two patents both use natural zeolite as the main raw material, and both claim to have the effect of improving the output and quality of shiitake mushrooms. The shiitake mushroom auxiliary materials successfully developed by patent CN1195467 are mainly used to replace gypsum and sawdust, and have the functions of water retention, fertilizer retention (slow release), ventilation, and regulation. pH and provide calcium and a variety of trace elements necessary for the growth of various edible fungi; the slow-release auxiliary materials for shiitake mushrooms successfully developed by patent CN1106200 are mainly used to replace bran and gypsum, and play a role in balancing nitrogen supply and regulating the delivery speed of nutrients. Zeolite and slow-release nutrients are the common characteristics of the two patents, and neither of the two patents is aimed at the control of heavy metal content in shiitake mushrooms