The study, conducted at the Research Farm of the College of Agriculture, University of Tabriz in 2021, focused on the effects of various nitrogen-fixing bacterial isolates, biofertilizers containing nitrogen and phosp...The study, conducted at the Research Farm of the College of Agriculture, University of Tabriz in 2021, focused on the effects of various nitrogen-fixing bacterial isolates, biofertilizers containing nitrogen and phosphorus, as well as iron and zinc foliar applications on mustard growth under rainfed conditions. The results indicated that biofertilizers, whether used alone or in combination with chemical fertilizers, produced comparable grain and oil outputs compared to chemical fertilizers alone. Additionally, the application of iron and zinc through foliar spraying significantly enhanced both grain and oil production. These findings suggest that integrating nitrogen-fixing bacteria and biofertilizers could reduce reliance on chemical nitrogenous fertilizers, leading to decreased production expenses, improved product quality, and minimized environmental impact. This study highlights the potential for sustainable agricultural practices in dry land farming as a viable alternative to traditional chemical-intensive methods. Substituting chemical nitrogenous fertilizers with nitrogen-fixing bacteria or biofertilizers could result in cost savings in mustard grain and oil production while promoting environmental sustainability.展开更多
氮和磷作为玉米生长发育的必需营养元素,对玉米产量的提高具有重要影响。本试验以登海111(Denghai 111,DH111)为供试材料,在2020年和2021年分别设置11个氮磷配施处理和15个氮磷配施处理来探究氮磷配施对夏玉米叶片衰老特性和产量形成的...氮和磷作为玉米生长发育的必需营养元素,对玉米产量的提高具有重要影响。本试验以登海111(Denghai 111,DH111)为供试材料,在2020年和2021年分别设置11个氮磷配施处理和15个氮磷配施处理来探究氮磷配施对夏玉米叶片衰老特性和产量形成的影响。结果表明:在相同施磷水平下,随着施氮量增加,夏玉米的叶面积指数(leaf area index,LAI)、叶绿素相对含量(SPAD值)、抗氧化酶活性超氧物歧化酶(superoxide dismutase,SOD)、过氧化物酶(peroxidase,POD)和过氧化氢酶(catalase,CAT)呈现先增加后降低的趋势,丙二醛(malondialdehyde,MDA)含量呈现先降低后增加的趋势,产量呈现先增加后降低的趋势。在N0~N2条件下,随施磷量增加,LAI、SPAD值、抗氧化酶活性呈现增加趋势,MDA含量呈现降低趋势,产量呈增加趋势;而在N3与N4条件下,随施磷量增加,LAI、SPAD值、抗氧化酶活性呈现先增加后降低的趋势,MDA含量呈现先降低后增加的趋势,产量呈现先增加后降低趋势。在2020年,N3 P1处理相较于N2 P3处理产量增加2.55%;2021年,N3 P1处理相较于N3 P0处理、N2 P2处理产量分别提高7.36%、3.31%。本试验条件下,合理氮磷配施(180 kg N hm^(-2)、60 kg P hm^(-2))通过提高玉米生育后期抗氧化酶活性,降低MDA含量,维持较高的叶面积指数与SPAD值,提高玉米穗粒数与千粒重,进而增加产量。展开更多
文摘The study, conducted at the Research Farm of the College of Agriculture, University of Tabriz in 2021, focused on the effects of various nitrogen-fixing bacterial isolates, biofertilizers containing nitrogen and phosphorus, as well as iron and zinc foliar applications on mustard growth under rainfed conditions. The results indicated that biofertilizers, whether used alone or in combination with chemical fertilizers, produced comparable grain and oil outputs compared to chemical fertilizers alone. Additionally, the application of iron and zinc through foliar spraying significantly enhanced both grain and oil production. These findings suggest that integrating nitrogen-fixing bacteria and biofertilizers could reduce reliance on chemical nitrogenous fertilizers, leading to decreased production expenses, improved product quality, and minimized environmental impact. This study highlights the potential for sustainable agricultural practices in dry land farming as a viable alternative to traditional chemical-intensive methods. Substituting chemical nitrogenous fertilizers with nitrogen-fixing bacteria or biofertilizers could result in cost savings in mustard grain and oil production while promoting environmental sustainability.
文摘氮和磷作为玉米生长发育的必需营养元素,对玉米产量的提高具有重要影响。本试验以登海111(Denghai 111,DH111)为供试材料,在2020年和2021年分别设置11个氮磷配施处理和15个氮磷配施处理来探究氮磷配施对夏玉米叶片衰老特性和产量形成的影响。结果表明:在相同施磷水平下,随着施氮量增加,夏玉米的叶面积指数(leaf area index,LAI)、叶绿素相对含量(SPAD值)、抗氧化酶活性超氧物歧化酶(superoxide dismutase,SOD)、过氧化物酶(peroxidase,POD)和过氧化氢酶(catalase,CAT)呈现先增加后降低的趋势,丙二醛(malondialdehyde,MDA)含量呈现先降低后增加的趋势,产量呈现先增加后降低的趋势。在N0~N2条件下,随施磷量增加,LAI、SPAD值、抗氧化酶活性呈现增加趋势,MDA含量呈现降低趋势,产量呈增加趋势;而在N3与N4条件下,随施磷量增加,LAI、SPAD值、抗氧化酶活性呈现先增加后降低的趋势,MDA含量呈现先降低后增加的趋势,产量呈现先增加后降低趋势。在2020年,N3 P1处理相较于N2 P3处理产量增加2.55%;2021年,N3 P1处理相较于N3 P0处理、N2 P2处理产量分别提高7.36%、3.31%。本试验条件下,合理氮磷配施(180 kg N hm^(-2)、60 kg P hm^(-2))通过提高玉米生育后期抗氧化酶活性,降低MDA含量,维持较高的叶面积指数与SPAD值,提高玉米穗粒数与千粒重,进而增加产量。