巴西陆稻IAPAR9播种期需水规律分析

Analysis on Water Requirement Regulation of Brazilian Up-Land Rice IAPAR9 in Sowing Time

将巴西陆稻IAPAR9种子置于不同水分处理的土壤中进行萌发试验。结果表明:随着土壤含水率的降低,IAPAR9的发芽速率、发芽势、发芽率、发芽指数、活力指数和苗体素质均出现不同程度的降低。相对含水率80%处理的各项指标均优于其他处理,故IAPAR9种子萌发的最佳土壤含水率在土壤田间持水率的80%左右。

Sprouting experiment for Brazilian up-land rice seed in different soil moisture was carried out. The result showed that with the reduction of soil moistttre, sprouting speed, germinative tendency, germinative percentage, sprouting index, vigor index and shoot quality of IAPAR9 decreased in different level. Each index of the treatment with the 80% relative soil water rate was superior to others, so it is suggested that the best soil water rate for seed sprouting of IAPAP9 was 80%.