论文部分内容阅读
田间小区试验研究了喷施亚硒酸钠不同浓度、时期、品种对紫云英硒含量的影响,结果表明:在120~360mg L-1亚硒酸钠溶液浓度范围内对紫云英鲜草产量可增产9.32%~14.8%,到420mg L-1对紫云英有轻微中毒现象,鲜草产量减产;在0~360 mg L-1浓度范围内,紫云英茎叶和花蕾的含硒量、硒蛋白含量和蛋白硒含量随喷施浓度的提高而增加,到420mg L-1紫云英茎叶和花蕾的硒含量降低。紫云英的茎叶浸出液的硒含量在0~300 mg L-1的范围内变化很小,但花蕾的浸出液的硒含量较大。在不同生长时期喷施对紫云英的硒含量影响较小,但随喷施时期的延迟对紫云英有机硒的含量有显著降低。不同品种紫云英在未喷施硒的情况下影响较小,喷施硒后,品种间有一定的差异,闽紫1号硒含量最高。
The field plot experiment was conducted to study the effects of spraying different concentrations of sodium selenite, period and varieties on the selenium content of Astragalus sinicus. The results showed that the selenium content of Astragalus membranaceus in the range of 120 ~ 360 mg L-1 sodium selenite solution The yield could increase 9.32% ~ 14.8%. To 420mg L-1 slightly poisoned the milk vetch, fresh grass yield was reduced. Within the range of 0 ~ 360 mg L-1, Selenoprotein content and protein selenium content increased with increasing spraying concentration, and the content of selenium in stem and leaf and flower bud of 420mg L-1 was decreased. The content of selenium in the stems and leaves leachate of Astragalus sinicus changed little in the range of 0-300 mg L-1, but the selenium content in the flower bud leachate was larger. Spraying at different growth stages had little effect on the selenium content of Astragalus sinicus, but the content of organic selenium in Astragalus sinicus decreased significantly with the delay of spraying period. Different varieties of Astragalus did not affect the application of selenium less in the case of spraying selenium, there are some differences between varieties, the highest selenium content of purple on the 1st.