洞庭湖区双季稻品种布局问题的探讨

根据洞庭湖区的气候条件和不同品种生长规律,从合理利用温光资源和趋利避害着眼,提出双季稻品种布局方案,早稻以中,迟熟品种并重(或中熟略多于迟熟);晚稻以杂交水稻为主,搭配晚梗,以取得最佳经济效益。

INVESTIGATION ON DISTRIBUTION OF RICE VARIETIES IN DOUBLE-CROPPING SYSTEM IN THE DONGTING LAKE REGION

So far, the distribution of double-cropping rice varieties in the Dongting Lake region has been a subject of considerable disscusion. In order to gain the greatest economic benefit. the author, with a view of making good use of temperature and light resources and avoiding unfavarable factors for rice growth, suggests the following distribution scheme of double-cropping rice varieties in accordance with the climatic conditions in the Dongting Lake region and the growth characteristics of different varieties (hybrids).(1)early rice: 50% medium-maturing varieties and 50% late-maturing varieties (or 55% medium-maturing varieties and 45% late-maturing varieties).(2)late rice: 90% hybrid rice and 10% keng (japonica) varieties.