论黑龙港地区旱地植棉技术

A Discussion on the Cultural Technique in Dry Cotton Fields in Heilonggang Area

黑龙港地区的旱地棉田应分为两大类:一类是旱而不薄亦不碱的中产类型,其生育特点变化大,单株结铃率不稳定,产量结构以伏桃和早秋桃为主,但年际间变化大,因雨量分布而异;配套措施应是促控并重。另一类是早薄碱的低产类型,其生育特点变化小,单株结铃率较稳定,产量结构以伏桃为主,年际间变幅小;其栽培技术应一促到底。

We think that the dry cotton fields in Heilonggang Area should be classified as two kinds: the first is dry but not thin nor alkali which has middle-level yield. Its growing habit varies greatly. The bollsetting rate per plant is not stable. The summer bolls and the early autumn bolls are the major bolls of yield and their numbers change largely with the changing of the amount of rain of each year. Both growth accelerating and controlling are practiced in different periods of this kind of cotton fields. The second is dry, thin and alkali which has low-level yield. Its growing habit varies lightly, the boll-setting rate per plant is stable, and the summer bolls are the major bolls of yield and its number changs lightly year from year. The growth accelerating is practiced in the whole life of the cotton in this kind of fields.