通过使用生化制剂借以改善植物根系周围土壤水分状况和林木本身的吸水能力。
The use of chemical preparation can improve the soil water condition of root environments and the seedlings' bibulous capacity.
采用盆栽试验，研究土壤水分与水稻秧苗根系形态建成的关系。
The relations between soil water content and the root system formation of rice seedlings were studied with pot experiments.
根据土管成因不同将其分为四种类型，即土壤动物活动导致的土管、植物根系形成的土管、土壤裂隙形成的土管和土壤水分运动形成的土管。
The pipes can be divided into four kinds based on their cause of formation, namely pipes formed by the animals, by the roots of plants, by the cracks of soil and by the soil water movement.
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