Regressive models were obtained by employing '311 B' and '3414' optimal regressive desingns through 5 year (1993～1997) field experiment,and by datum processing with computer.These models express the...Regressive models were obtained by employing '311 B' and '3414' optimal regressive desingns through 5 year (1993～1997) field experiment,and by datum processing with computer.These models express the relationships between corn yields in high,middle and low yield areas and N,P,and K application rates in black soil.By analysis to the models,the fertilizer application rates for maximum yield and optimal yield were achieved.展开更多
探索黑糯玉米硒吸收利用和籽粒营养品质对叶面喷施有机硒肥的响应,对生产中合理施用硒肥,进而支撑山西“特”“优”农业高质量发展具有重要意义。本研究以品种晋鲜糯8号为试验材料,于2020—2021年连续2年在山西晋中黑糯玉米典型种植区...探索黑糯玉米硒吸收利用和籽粒营养品质对叶面喷施有机硒肥的响应,对生产中合理施用硒肥,进而支撑山西“特”“优”农业高质量发展具有重要意义。本研究以品种晋鲜糯8号为试验材料,于2020—2021年连续2年在山西晋中黑糯玉米典型种植区开展田间试验,设置一次喷施不同用量有机硒0、6和12 g Se hm^(-2),以及喷施量12 g Se hm^(-2)条件下分2次喷施,共4个处理,研究叶喷有机硒对黑糯玉米产量、硒吸收利用、籽粒花青素和铁锰铜锌含量的影响。结果表明,喷硒量和喷硒次数对黑糯玉米鲜食期籽粒产量和成熟期地上部各器官干物质量无影响。相比不喷硒,喷硒可提高鲜食期籽粒和成熟期地上部各器官硒含量、硒积累。喷硒12 g Se hm^(-2)时,籽粒硒含量达到满足人体硒营养需求的最低目标值100μg kg^(–1),增幅最大,介于110~181μg kg^(–1)。成熟期,植株各器官硒积累从高到低依次为叶片、籽粒、茎秆、苞叶、穗轴。喷硒12 g Se hm^(-2),分2次喷施的平均籽粒硒强化指数和籽粒硒回收率分别为6.95(μg kg^(–1))(g hm^(-2))^(–1)和2.4%,优于1次喷施。同时,鲜食期籽粒花青素和铁锰锌含量也最高, 2年平均值分别为209、27.9、15.9和22.8 mg kg^(–1),但各处理间籽粒铜含量无差异。因此,兼顾硒吸收利用和籽粒营养品质同步提升,该区黑糯玉米生产中叶喷有机硒肥用量至少应不低于12 g Se hm^(-2),且分2次喷施效果较优。展开更多
文摘Regressive models were obtained by employing '311 B' and '3414' optimal regressive desingns through 5 year (1993～1997) field experiment,and by datum processing with computer.These models express the relationships between corn yields in high,middle and low yield areas and N,P,and K application rates in black soil.By analysis to the models,the fertilizer application rates for maximum yield and optimal yield were achieved.
文摘探索黑糯玉米硒吸收利用和籽粒营养品质对叶面喷施有机硒肥的响应,对生产中合理施用硒肥,进而支撑山西“特”“优”农业高质量发展具有重要意义。本研究以品种晋鲜糯8号为试验材料,于2020—2021年连续2年在山西晋中黑糯玉米典型种植区开展田间试验,设置一次喷施不同用量有机硒0、6和12 g Se hm^(-2),以及喷施量12 g Se hm^(-2)条件下分2次喷施,共4个处理,研究叶喷有机硒对黑糯玉米产量、硒吸收利用、籽粒花青素和铁锰铜锌含量的影响。结果表明,喷硒量和喷硒次数对黑糯玉米鲜食期籽粒产量和成熟期地上部各器官干物质量无影响。相比不喷硒,喷硒可提高鲜食期籽粒和成熟期地上部各器官硒含量、硒积累。喷硒12 g Se hm^(-2)时,籽粒硒含量达到满足人体硒营养需求的最低目标值100μg kg^(–1),增幅最大,介于110~181μg kg^(–1)。成熟期,植株各器官硒积累从高到低依次为叶片、籽粒、茎秆、苞叶、穗轴。喷硒12 g Se hm^(-2),分2次喷施的平均籽粒硒强化指数和籽粒硒回收率分别为6.95(μg kg^(–1))(g hm^(-2))^(–1)和2.4%,优于1次喷施。同时,鲜食期籽粒花青素和铁锰锌含量也最高, 2年平均值分别为209、27.9、15.9和22.8 mg kg^(–1),但各处理间籽粒铜含量无差异。因此,兼顾硒吸收利用和籽粒营养品质同步提升,该区黑糯玉米生产中叶喷有机硒肥用量至少应不低于12 g Se hm^(-2),且分2次喷施效果较优。
