长江下游生态条件与采种甜菜优质高产栽培技术的研究

The cultural techniques of good quality and high yield for seed collecting beets under ecological condition along the low reaches of changjiang river

长江下游地区露地越冬采种甜菜的适宜播期为８ 月上旬， 移栽期在９ 月中、下旬， 移栽期秧龄在８ ～１０ 片叶，适宜栽植密度５２５００ 株／ｈｍ２ 。冬前块根直径达４ ～５ｃｍ ，３ 月上旬挖顶芽，孕蕾期打花蕾，始花期根外喷施磷酸二氢钾，生育期要开沟降渍。

The optimum sowing date of overwinter seed collecting beets in the early of Aug. in the low reaches of Changjiang River, transplanting period is in the mid-late of Semp. the transplanting seedling age is 8～10 leaves with 52500 plants/ha. diameter of the steckling is 4～5 cm for winter storage, cut top buds of beets and spray potassium dihydrogen phosphate before flowering, during the growing period, should give attention to furrowing and controlling pests and diseases.