The Causes and Prevention of the Degradation of Gastrodia

The reasons are generally as follows:

1, multiple generations of asexual reproduction. Generally after 5 to 6 generations of vegetative reproduction began to degenerate, but in different soil quality, the degree of deterioration in the degree of degradation are different, with the degradation of granite soil cultivation slower, followed by yellow brown soil sand parent material, shale or limestone Weathering formed acidic soil.

2, continuous work. In general, the annual output is high and the following year is low. After 3 to 4 years, the output declines rapidly.

3, degradation of Armillaria. The first manifestation is adaptability, reduced stress resistance, and slow growth of mycelial growth; then there is no elasticity, brittleness, or even an empty shell. With the increasing number of transit algebras, Armillariella forms a thick, long and numerous branching brown-black fungus net on the bacterial material.

4, dense deep cultivation. This method leads to a lack of oxygen during the growth of Gastrodia, which leads to a decrease in vitality.

5, disease. The old species of ramie, the old fungus material, and the old burdock are most susceptible to disease, and the light grows poorly, and the severe ones do not receive it.

6, high temperature. Induced accelerated disease, resulting in poor growth of Gastrodia, the most obvious is the arrowhead head was "bottleneck"-like, rice hemp, a small increase of white alum, rotten hemp increased.

Control methods: 1 Introduction with wild species and different places, especially from the high ground to the low elevation. 2 Screening and cultivation of high quality Honey fungus strains, purification and expansion, comparison of lines, rejuvenation and breeding, cultivation of high-quality bacteria materials, and use of high-quality loose culture materials as fillers and coverings. 3 Change the cultivation place, use acidic sandy loam soil to avoid continuous cropping. 4 Adopt sexual reproduction techniques. Sexual reproduction alternates with vegetative reproduction, and sexual reproduction of bulbs is only 4 to 5 generations. 5 Apply hybrids. 6 prevent disease.

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