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在1979年的两个季节进行试验,选用早熟和中熟水稻品种,土壤为沙壤土,研究秧龄与产量之间的关系。以前的研究者认为,在任何土壤与农业气候地区,都以25天的秧龄为最好。本试验早熟品种用 ADT31和 TKM9,中熟种用 IR-20和 ASD15,发芽前种子用3％磷酸二铵处理,分为四个秧龄移栽。
In the two seasons in 1979, the experiment was conducted. The varieties of early-maturing and medium-maturity rice were selected and the soil was sandy loam. The relationship between seedling age and yield was studied. Previous researchers have argued that 25 days of seedling age is best in any soil and agro-climatic region. The early varieties of this experiment with ADT31 and TKM9, medium-mature IR-20 and ASD15, pre-germination seeds with 3% diammonium phosphate treatment, divided into four transplanting seedling age.