Effects of different karst fissures and rainfall distribution on the biomass, mineral nutrient elements, antioxidant substances, and photosynthesis of two coniferous seedlings.

yunnanensis seedlings, the content of K + , Ca 2+ , Na + , and Mg 2+ in various organs showed extremely significant differences ( P < 0.01) under different karst fissures and rainfall durations.

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However, the root tissue density showed a decreasing trend.

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Under the same rainfall duration, the content of photosynthetic pigments shows a significant trend of first increasing and then decreasing with the deepening of karst cracks.

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yunnanensis seedlings increased with the increase of karst habitat, while the specific root length and specific root area showed a trend of first decreasing and then increasing.

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