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苗木的产量、质量与育苗地的生态条件密切相关,其中以土壤的水分条件对落叶松播种苗影响较大。水是苗木最基本的成分,充满水分的细胞,保持紧张的状态,使茎叶挺直伸展,有利于接受阳光,进行正常的生理活动;水是苗木光合作用的原料,苗木吸收光能;在酶的作用下,利用水和二氧化碳合成碳水化合物;水是苗木体内的主要溶剂,对土壤养分的吸收和体内养分的运转,都要以水作溶剂才能实现;水是苗木体内一切生化反应的介质,苗木体内有机物质的合成与分解,必须在水中进行。所以,水是苗
The yield and quality of nursery stock are closely related to the ecological conditions of nursery area, among which the influence of soil moisture on seeding larch is more significant. Water is the most basic component of seedlings, water-filled cells, to maintain tension, the stems and leaves straight stretch, is conducive to receiving sunlight, the normal physiological activity; water is the seedling photosynthesis of raw materials, seedlings absorb light energy; enzyme Under the action of the use of water and carbon dioxide synthesis of carbohydrates; water is the main solvent in the seedling body, the absorption of soil nutrients and nutrients in the body operation, should be made of water as a solvent; water is the body of all seedlings biochemical reactions in the medium, The synthesis and decomposition of organic matter in the body, must be carried out in water. So, water is seedling