A Detailed Guide to the Latest Findings on the Growing Environment of Morel Mushrooms
Morel mushrooms are rare edible and medicinal fungi of the genus Morchella in the family Morchellaceae, often growing on broadleaf forest floors and beside roads, singly or in groups. Wild morels are distributed in China's Tibet and Yunnan regions, the Tianshan Mountains in Xinjiang, and are also commonly found in the Changbai Mountain area of Jilin. Now let us take a look at the growing environment of morel mushrooms!
Nutritional Conditions for Morel Mushrooms
The better carbon sources for morel mushrooms are soluble starch, fructose, maltose, sucrose, glucose, and the like. The better nitrogen sources are cysteine monohydrochloride, aspartic acid, asparagine, urea, alanine, glutamic acid, and the like. Wood extract, tomato juice, malt extract, and apple extract all promote the growth of morel mushrooms, with wood extract having the greatest growth-promoting effect. Using an agar medium with humus soil leachate to culture mycelium at 20°C, the mycelium can cover the entire slant in 7-10 days.
Forest Stand Conditions for Morel Mushrooms
Morel mushrooms generally grow under the trees of Pinus, Lindera, Quercus, and other genera, and are especially fond of growing in old apple orchards. The ash and charred wood of apple trees are the best nutrients for morel mushrooms. They can occur in Paulownia nurseries, pear orchards, bamboo groves, as well as under broadleaf forests of white poplar, Chinese tallow tree, poplar, willow, walnut, Rosaceae, Fagaceae, and others. They can also appear in spruce and fir coniferous forests or mixed coniferous-broadleaf forests, and even in corn fields and shrublands.
Humidity Requirements for Morel Mushrooms
During the mycelium growth stage of morel mushrooms, the soil moisture content is around 50%, with relatively low humidity. The formation of primordia and the development of fruiting bodies require a large amount of water (80-90 mm of precipitation). Especially in February and March, monthly precipitation of 40-50 mm, with a single precipitation event of 5-6 mm occurring once every 4-5 days, is most suitable for fruiting body development. The relative humidity in the forest is also relatively high, generally at 80%-85%.
Temperature Requirements for Morel Mushrooms
Morel mushrooms belong to the low-temperature type of fungi. The underground mycelium begins to grow in early spring at 1-2°C. The fruiting period is in March and April. At 10-25°C, the daily growth rate of mycelium accelerates as the temperature rises. Above 28°C, the daily growth rate of mycelium drops linearly. At 25°C, although the daily growth rate of mycelium is the fastest, the mycelial mat is thin and prone to aging. At around 20°C, the mycelium grows relatively fast and is dense and robust. Therefore, the optimal growth temperature for morel mushroom mycelium is 17-22°C.