摘要
以常规早籼稻品种中嘉早17为试验材料,采用直播水稻的2种不同催芽程度——破胸和芽谷,模拟早稻直播后5 d内遭遇不同时段长低温,研究了不同强度及时长的低温胁迫对早稻成苗率及幼苗生长特性的影响。结果表明:在低温处理下,幼苗可溶性蛋白和脯氨酸含量有不同程度的升高,水稻的成苗率、苗高、第一叶长、茎叶干重显著降低,且随温度降低和处理时间的增加,成苗率的下降程度加剧;低温对水稻生长的影响存在强度与时间的互作效应;破胸谷苗在12℃以上温度处理5 d后恢复生长,成苗率可达87%以上,破胸谷种的耐低温能力强于芽谷。
The effects of different low temperature intensities and durations within 5 days after sowing with different degrees of pregermination（ husk-broken seed,and seed with bud） on the seedling-forming rate and seedling growth characteristics of early indica rice variety Zhongjiazao 17 were studied. The results showed that： under low temperature stress,the soluble protein and proline contents in rice seedlings increased to various extents,but the seedling-forming rate,seedling height,length of the first leaf,and dry weight of stems and leaves were significantly decreased,and the seedling-forming rate sharply decreased with the decrease in temperature and the increase in treatment time. The intensity and duration of low temperature stress had an interaction on the growth of rice seedlings. Recovering the growth after the husk-broken seeds were treated at over 12 ℃ for 5 days,their seedling-forming rate reached 87%. The husk-broken seeds had a stronger tolerance to low temperature than the seeds with bud.
作者
王海媛
张坤
段里成
章起明
郭瑞鸽
WANG Hai-yuan ZHANG Kun DUAN Li-cheng ZHANG Qi-ming GUO Rui-ge(Agricultural Meteorological Center of Jiangxi Province, Nanehang 330096, China College of Agronomy, Jiangxi Agricultural University, Nanchang 330045, China)
出处
《江西农业学报》
CAS
2017年第10期19-23,47,共6页
Acta Agriculturae Jiangxi
基金
江西省气象科技项目"早春气候资源在水稻生产中的利用技术研究"
中国气象局气象关键技术集成与应用项目"主要农林病虫害气象预报预警关键技术集成与应用"(CMAGJ2015Z02)
关键词
直播早稻
低温
催芽程度
成苗率
生长特性
Directly-sown early rice
Low temperature
Degree of pregermination
Seedling-forming rate
Growth characteristics
