摘要
以早杂89A-华联2号供试,利用山区不同海拔高度的农业气候条件,研究了在苗床不同生态条件(床土、氮肥、水分)下育成的秧苗抗寒能力.结果表明:旱育秧的抗寒能力普遍增强.在五天平均日均温13.6℃的情况下,死叶率比湿育秧减少15.7%～16.9%;在五天平均日均温15.4℃的情况下,栽后新出叶的生长障碍比湿育秧明显减轻;分蘖发生的起始温度为17.0～17.5℃,比湿育秧低1℃.在相同旱育条件下,适当追施化学氮肥,控制苗床水分,也有利于提高秧苗素质,增强抗寒能力.最后就增强秧苗抗寒能力的适宜生态条件作了某些探讨.
With early hybrid rice 89A-hualian 2 as test variety, the anti-cold ability of rice seedlings that were raised on the seedling bed with different ecological conditions (soil, nutrient, water)was studied under conditions of agricultural climate with different height above sealevel. Results showed that anti-cold ability of dry-raised seedlings were stronger than that of wet-raised seedlings. When average dairy temperature of five days was 13.6℃, the rate of dead leaves of dry-raised seedlings was reduced by 15. 7%～16.9% than that of wet-raised seedlings. When the temperature was 15. 4℃ , the new leaves growth obstrction of dry-raised seedlings after transplanting was obvious lightened than that of wet-raised seedlings. The range of temperature was 17. 0～17.5℃ for dry-raised seedlings to begin tillering. This temperature was lower 1℃ than for wet-raised seedlings to begin tillering. The quality and anti-cold ability of seedlings were enhanced by applying nutrient fertilizer and controlling water in the period of seedling dry-raised.
出处
《作物学报》
CAS
CSCD
北大核心
1999年第2期199-207,共9页
Acta Agronomica Sinica
基金
农业部"八五"攻关项目资助
关键词
土壤生态条件
水稻
旱育秧
抗寒能力
Ecological condition of soil
Rice dry-raised seedlings
Anti-cold ability
