不同育秧物质对机插晚稻秧苗生育特性及产量的影响

为筛选适合双季稻区晚稻机插育秧的育秧物质,指导晚稻机插育秧实践。以杂交晚稻五丰优T025为材料进行田间试验,设常规浸种(CK)、拌种剂拌种、旱育保姆拌种、在一叶一心时喷200 mg/kg多效唑4个处理,研究不同育秧物质对机插晚稻秧苗生长发育及产量的影响。结果表明:不同育秧物质均有明显的矮化壮秧和增产作用,其中多效唑处理秧苗根数、假茎宽、苗体全氮含量及可溶性糖含量最高,潜在分蘖能力强成秧率最高且较对照高出5.11%;机插质量最好且漏蔸率较对照降低3.00%;产量最高且较对照增加11.89%。综合来看,多效唑是较好的机插晚稻育秧物质。

不同生长调节物质对机插早稻秧苗生育特性及产量的影响

为揭示生长调节物质对机插双季杂交早稻秧苗生育特性及产量的影响,以杂交早稻‘淦鑫203’为材料,选用旱育保姆、拌种剂、多效唑3种生长调节物质并设置对照处理进行田间试验。结果显示:3种生长调节物质均能矮化壮秧,增加秧苗假茎宽、绿叶数、根量、苗体可溶性糖含量及全氮含量,提高分蘖能力及成秧率,保证机插质量,增加产量。其中多效唑处理矮化壮秧效果最好,成秧率最大且较对照高3.74%,产量最高且较对照增产9.98%。综合来看,生长调节物质均能壮秧增产,且多效唑是杂交早稻机插育秧较为理想的生长调节物质。

赤霉素和营养物质对油菜种子萌发及秧苗生育的协同作用

研究了在穴盘育苗条件下,生长调节剂赤霉素(GA3)和营养物质硝酸钾、硼砂、钼酸铵单独使用和混合使用对油菜种子萌发、秧苗生长的影响。结果表明,GA3和营养物质混合处理效果优于二者分别单独使用,以20～40mg/LGA3+10g/LKNO3+100mg/LNa2B4O7+100mg/L(NH4)6Mo7O24处理最佳。

Effects of Bast Fiber Seedling Film on Quality and Root Respiration Enzyme Activities of Seedlings of Different Rice Varieties

This study was conducted to investigate the effects of bast fiber seedling film on rice seedling growth. In this study, indica cultivar ＇Xiangwanxian 13＇ and indica hybrid cuitivar ＇Y Liangyou 1＇ were used to investigate the changes of aboveground part growth and root respiration enzyme activities of rice seedlings af- ter the application of bast fiber seedling film. The results showed that, compared with the CK, the accumulation of shoot biomass, chlorophyll content, root bleeding intensity, soluble sugar content, and nitrate nitrogen content were significantly im- proved with the application of bast fiber seedling film. In addition, the activities of malate dehydrogenas （MDH） and alcohol dehydrogenas （ADH） were higher in rice seedling roots raised with bast fiber seedling film, while there was no significant change in lactate dehydrogenase （LDH） after the application of bast fiber seedling film. However, there were no significant differences in these indexes between the two cultivars. All the results indicated that the growth and development of rice seedlings could be improved with the application of bast fiber seedling film.

旱育稀植育秧田间小气候研究

研究旱育稀植育秧的田间小气候效应及对秧苗生长发育的影响，并以水播育秧为对照。结果表明，两种育秧方式的田间小气候变化差异明显，特别是在阴冷天气旱育秧增温保温效应更显著，旱育秧的生理性状明显优于水育秧，其抗寒性、抗旱性、抗逆性均比水育秧强，插后有很强的暴发力。同时根据本试验所得的资料，对旱育秧苗生长与积温的关系建立了其动态生长模拟模式，经检验，其模拟效果精确度很高。