本文以动态的观点研究了苎麻头、二、三麻的化学性能、生物学特性在整个生长期内的变化规律。
This paper studies the changes of chemical properties and biological characteristics of the three crops of ramie during the whole growth phase.
养分的有效性是由土壤物理、化学和生物学特性，特别是根系主导的根际动态过程所决定的。
The availability of mineral nutrients for plants is determined by the chemical, physical and biological characteristics of soils, especially by root-induced changes in the rhizosphere.
养分的有效性是由土壤物理、化学和生物学特性，特别是根系主导的根际动态过程所决定的。
The availability of mineral nutrients for plants is determined by the chemical, physical and biological characteristics of soils, especially by root-induced changes in the rhizosphere.
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