硒、钴配施对玉米产量及籽粒蛋白质和硒、钴含量的影响

通过盆栽试验,研究了Se、Co配施对玉米产量和籽粒中蛋白质、Se、Co含量的影响。结果表明:单施Se对玉米产量无明显不良影响;单施5mg·kg-1的Co对玉米产量无明显影响,但10mg·kg-1和20mg·kg-1的Co处理可明显降低玉米产量;5mg·kg-1的Co和0.5mg·kg-1的Se配施可明显提高玉米产量,比对照(C0S0)提高35.75%。单施Se和单施Co以及Se、Co配施均对玉米籽粒中蛋白质含量无明显影响。单施Co对玉米籽粒的Se含量影响不大,而单施Se以及Se、Co配施均可明显提高玉米籽粒的Se含量。单一施Se和单一施Co可以提高玉米籽粒中Co的含量。Se、Co配施时,施Co10mg·kg-1和20mg·kg-1时,Se能抑制Co在玉米籽粒中的积累。Se、Co配施能明显改善玉米籽粒Se、Co的营养状况,且各处理玉米籽粒中Se、Co含量均低于牲畜、家禽的最大安全量。

Effect of combined Se and Co application on yield and protein,Se and Co contents in grain of corn

A pot experiment was conducted to study the effect of combined Se and Co application on the yield, and the grain protein, Se and Co contents of corn. The results show that the application of Se alone does not significantly affect corn yield. Yield is also not affected when Co alone is applied at the rate of 5 mg·kg^-1. However, yield of corn obviously drops at 10 mg·kg^-1 or 20 mg·kg^-1 Co. Compared with the control, yield increases by 35.75% under combined application of 0.5 mg·kg^-1 Se and 5 mg·kg^-1 Co. Grain protein content is not influenced by individual or combined applications of Se and Co. Grain Se content is also not notably affected by Co. However, grain Se content increases under Se or combined application of Se and Co. Grain Co content increases under indi-vidual application of Se or Co. However, grain Co content decreases under combined application of 10 mg·kg^-1 or 20 mg·kg^-1 Co with Se. Generally, corn Se and Co nutrient improves under combined Se and Co application. Moreover, grain Se and Co is below the maximum safe level for livestock and poultry.