本文对双季稻高产优质高效栽培途径与传统栽培法的生理基础进行了比较研究。结果表明,采用“双高一优”法栽培,水稻根系特别发达,对氮、磷、钾的吸收能力及根系过氧化物酶活力均明显优于对照;功能叶的碳氮同化协调,呼吸消耗少,谷粒灌浆启动快,速率大;尤以以下三方面的结果更具有意义。(1) 水稻每克鲜根的氧化力低于对照17.5%—36.1%。(2) 叶片的叶绿素b含量及叶绿素溶液在430nm附近的O.D值分别比对照高49%—68%,67%—106%,剑叶透光率较对照低22.2%。(3) 功能叶及根系的硝酸还原酶活力比对照低,表现出与高产耐肥品种一样的生理特性。此外,本文还对根系活力及其与土壤环境的关系,作物根系及田间杂草对改良土壤、提高地力的作用,提出了新的看法。 In this paper, we compared the physiological basis of double cropping rice with high yield, high yield and high efficiency and traditional cultivation method. The results showed that under the cultivation of “Shuanggaoyiyou” method, the root system of rice was particularly developed, and the absorption capacity of nitrogen, phosphorus and potassium and the activity of peroxidase of roots were obviously better than those of the control. The assimilation of carbon and nitrogen assimilation and respiratory exhaustion Less, grain filling start fast, large rate; especially in the following three aspects of the results more meaningful. (1) The oxidizing power of fresh roots per gram of rice was 17.5% -36.1% lower than that of the control. (2) Leaf chlorophyll b content and chlorophyll solution in the vicinity of 430nm O.D values ​​were 49% -68%, 67% -106% higher than the control, the flag leaf light transmittance 22.2% lower than the control. (3) The nitrate reductase activity of functional leaves and roots was lower than that of the control, showing the same physiological characteristics as the high-yielding varieties. In addition, this paper also put forward new ideas on the root vitality and its relationship with the soil environment, crop roots and field weeds to improve the soil, improve soil fertility.