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近年,随着水稻节工省本集约化栽培方式不断推广,水稻直播栽培面积迅速扩大,在江苏中南部地区不推自广,各项配套栽培技术正在不断探索。直播水稻基本苗数是实现高产的基础,在相同播种量条件下水稻直播栽培出苗率的高低直接决定着基本苗多少。因此,在安全播种期条件下,直播水稻高产要攻克的第一关就是出苗问题。近年,我们根据水稻直播栽培的生产实践,通过室内试验对出苗率与发芽势、发芽率及播种深度等相关性进行探索,现将初步试验探索总结如下。
In recent years, along with the constant promotion of intensive cultivation methods in rice-saving provinces and autonomous regions, the area for direct-seeding rice has rapidly expanded, and it is not pushed forward in southern central Jiangsu Province. Various cultivation techniques are continuously explored. The number of direct seeding rice seedlings is the basis for achieving high yield, the same sowing conditions, the direct seeding rice seedling rate directly determines the number of basic seedlings. Therefore, under the conditions of safe planting, the first pass of direct seeding rice high yield is the emergence problem. In recent years, according to the practice of direct seeding cultivation in rice, we have explored the relativity between germination rate, germination potential, germination rate and sowing depth through laboratory experiments. The preliminary experiments are summarized as follows.