气象因子对甘蔗不同下种方式出苗状况的影响

The effect of meteorological factors on emergence situation of cane for different seed cane planting ways

本文通过两年的田间试验 ,分析了气象因子对桂糖 1 1号和新台糖 1 6号这两个甘蔗品种的 4种不同下种方式 ,即砍种浸种 ( )、砍种不浸种 ( )、剥叶不砍种 ( )、不剥叶不砍种 ( )的出苗状况的影响。结果表明 :在土壤干旱条件下 ,甘蔗的出苗时间大大延迟 ;处理 、 、 下种方式的出苗时间受土壤水分影响很大。甘蔗旬出苗数与旬降雨量及土壤含水量呈线性正相关关系 ,尤其是处理 相关极显著。在土壤干旱条件下 ,甘蔗幼苗死苗率与干旱天数呈显著线性正相关关系 ;处理 的出苗率降低而死苗率最高 ,处理 的出苗率较高而死苗率很低。因此认为处理

By carrying out the field test for two years, the effect of meteorological factors on emergence situation for two sugarcane cultivars, GT11 and ROC16, with four different seed cane planting ways have been analysed.This four ways are sterilized twobud seed cane (Ⅰ), nonsterilized twobud seed cane (Ⅱ), multiplebud seed cane without sheath (Ⅲ), and multiplebud seed cane with sheath (Ⅳ). The result indicated that, under the condition of soil drought, the emergence stage would be delayed a lot. The emergence stage of Ⅱ,Ⅲ and Ⅳ way was badly influenced by the soil moisture content. There was significantly positive linear relationship between the amount of germination and rainfall, soil moisture content for ten days. Especially in the way Ⅲ, the relationship was significant. Under the condition of soil drought, there was also significantly positive linear relationship between the death rate of the sugarcane seeding and the days of drought. The germination rate of the way Ⅰ was lower and the death rate of seeding highest. But in the way Ⅲ, the germination rate was higher and the death rate of seeding lowest. Therefore,the way Ⅲ was thought can bring a better effect against drought.