摘要
为规模化生产富硒青贮饲料提供富硒方案和理论依据,以青贮玉米'隆平 533'和'大京九 26'为试验材料,设置 5 个供硒水平(0、58.35、116.70、175.05、233.40 g/hm2)的 2 因素裂区试验,研究其对发酵饲料硒含量、产量及品质的影响.结果表明:青贮玉米喷施硒液可以有效提高其发酵饲料的硒含量,且随施硒量的增加而递增:58.35、116.70、175.05、233.40 g/hm2 处理下,'隆平 533'和'大京九 26'的硒含量较CK组分别提高了 4.84、10.5、14.5、27.5 倍和 5.99、12.61、12.77、24.84 倍(P<0.05);相同硒处理下,不同品种发酵饲料硒含量存在显著差异(P<0.05).适宜硒处理可以显著提高单株叶鲜重、穗鲜重和干草产量,对株高、穗位高、茎粗等植株性状及单株茎鲜重、鲜草产量、干物质含量无显著影响;可显著增加饲料中粗蛋白质和淀粉含量,降低中性洗涤纤维和酸性洗涤纤维含量.综上,采用无人机在青贮玉米散粉期喷施亚硒酸钠溶液,不仅可以提高其发酵饲料硒含量,且适宜用量可以增加干草产量并改善其品质.最佳富硒方案为:在青贮玉米散粉期喷施 0.90～211.05 g/hm2 亚硒酸钠,其饲料硒含量符合陕西省富硒青贮饲料标准.
Abstract
The purpose of this paper was providing selenium rich plans and theoretical basis for the large scale field production of selenium rich silage feed.With silage corn varieties'Longping 533'and'DajingJiu 26'as experimental materials,effects of spraying selenium solution on the selenium content,the yield and qualities of silage corn fermented feed were studied by setting 2-factor split zone tests of five selenium supply level(0,58.35,116.70,175.05,233.40 g/hm2)in this paper,study its effects on selenium content,yield,and quality of fermented feed for silage corn.The results indicated that the selenium content of fermented feed was increased effectively by spraying selenium solution,and the selenium content increases with the increase of concentration.When the amount of exogenous selenium applied was 58.35,116.70,175.05,233.40 g/hm2,the selenium content of'Longping 533'and'Dajingjiu 26'increased by 4.84,10.5,14.5,27.5 times and 5.99,12.61,12.77,24.84 times compared with CK,respectively(P<0.05).With the same treatment of selenium,there were significant differences among different corn varieties in selenium content of fermented feed(P<0.05).The fresh leave weight of single plant,the fresh weight of corn ears and the hay yield were significantly increased by suitable treatments which no significant effect on the plant height,ear height,stem diameter,fresh weight of individual stem,fresh grass yield and dry matter content.Suitable treatments could aslo significantly increase the contents of the crude protein and starch in feed and reduce the contents of neutral detergent fibre,and acid detergent fibre.In summary,spraying sodium selenite solution during the silage corn powder stage by drones could increase the selenium content of fermented feed,which aslo increased the hay yield and improve qualities with suitable treatments.Spraying 0.90～211.05 g/hm2 sodium selenite during the powder stage was the optimal selenium enrichment plan and the selenium content of the fermented feed reached the selenium rich silage feed standard of Shanxi Province.
维普
万方数据