{"title":"不同氮肥水平和刈割间隔下杂草稻青贮价值潜力的开发","authors":"Aniqa Mubeen","doi":"10.21162/pakjas/22.658","DOIUrl":null,"url":null,"abstract":"Weeds, often considered a “menace” are top-notch, adroit survivors having intrinsic value as source of biodiversity and various promising uses as bio-resource. Among other benefits, their use as feed/food source or raw material is still to be explored. Weedy rice (Oryza sativa f. spontanea) a conspecific of rice has rapid growth, ability to uptake more fertilizer and produce large biomass. Lot of efforts are done for its management but little is known about its nutritive value and utilization as feed source for livestock. Therefore, the present study was carried out at Agronomic Research Area, University of Agriculture, Faisalabad in 2017 and 2018 to optimize N level and harvesting time for improving growth and silage quality of weedy rice sown as sole crop. Treatments comprised of four N levels viz: 0, 100, 120 and 140 kg ha-1 and harvesting intervals viz. 15, 25 and 35 days after heading (DAH). Weedy rice harvested at different intervals after onset of heading stage was used for making silage and analysed for nutritive value. Results depicted that, maximum plant height, fertile tillers, panicle length, kernels per panicle and LA were obtained with 120 kg ha-1 N and harvesting at 25 DAH during both years, while NDF, ADF, cellulose, and hemicellulose were highest with no fertilizer. Crude protein was highest with N application at 120 kg ha-1 and harvesting at 25 DAH. Highest nitrogen contents in plants, plant biomass, WSC, ash and DM in silage were recorded with 140 kg ha-1 N when harvested at 35 DAH. Weedy rice harvested at 25 DAH with N application at 120 kg ha-1 seems to be better combination for rational use of nutrients, better productivity and improving most of the nutritive traits of whole crop weedy rice silage","PeriodicalId":19885,"journal":{"name":"Pakistan Journal of Agricultural Sciences","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Exploiting the potential of weedy rice as value added silage under different nitrogen levels and cutting intervals\",\"authors\":\"Aniqa Mubeen\",\"doi\":\"10.21162/pakjas/22.658\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Weeds, often considered a “menace” are top-notch, adroit survivors having intrinsic value as source of biodiversity and various promising uses as bio-resource. Among other benefits, their use as feed/food source or raw material is still to be explored. Weedy rice (Oryza sativa f. spontanea) a conspecific of rice has rapid growth, ability to uptake more fertilizer and produce large biomass. Lot of efforts are done for its management but little is known about its nutritive value and utilization as feed source for livestock. Therefore, the present study was carried out at Agronomic Research Area, University of Agriculture, Faisalabad in 2017 and 2018 to optimize N level and harvesting time for improving growth and silage quality of weedy rice sown as sole crop. Treatments comprised of four N levels viz: 0, 100, 120 and 140 kg ha-1 and harvesting intervals viz. 15, 25 and 35 days after heading (DAH). Weedy rice harvested at different intervals after onset of heading stage was used for making silage and analysed for nutritive value. Results depicted that, maximum plant height, fertile tillers, panicle length, kernels per panicle and LA were obtained with 120 kg ha-1 N and harvesting at 25 DAH during both years, while NDF, ADF, cellulose, and hemicellulose were highest with no fertilizer. Crude protein was highest with N application at 120 kg ha-1 and harvesting at 25 DAH. Highest nitrogen contents in plants, plant biomass, WSC, ash and DM in silage were recorded with 140 kg ha-1 N when harvested at 35 DAH. 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引用次数: 0
摘要
杂草,通常被认为是一种“威胁”,是一流的、熟练的幸存者,作为生物多样性的来源具有内在价值,作为生物资源具有各种有前景的用途。除其他好处外,它们作为饲料/食物来源或原料的用途仍有待探索。杂草水稻(Oryza sativa f.spontana)是一种水稻的同种,生长迅速,能够吸收更多的肥料并产生大量的生物量。人们对其进行了大量的管理,但对其营养价值和作为牲畜饲料来源的利用却知之甚少。因此,本研究于2017年和2018年在费萨拉巴德农业大学农学研究区进行,以优化N水平和收获时间,改善作为唯一作物播种的杂草水稻的生长和青贮饲料质量。处理包括四个N水平,即0、100、120和140 kg ha-1,收割间隔为抽穗后15、25和35天(DAH)。在抽穗期开始后的不同时期收获的杂草稻被用于制作青贮饲料,并分析其营养价值。结果表明,在这两年中,施用120 kg ha-1 N和25 DAH收获时,获得了最大株高、可育分蘖数、穗长、每穗粒数和LA,而不施肥时NDF、ADF、纤维素和半纤维素最高。粗蛋白含量最高,施氮量为120 kg ha-1,收获量为25 DAH。当在35DAH收获时,以140kg ha-1N记录了青贮饲料中植物、植物生物量、WSC、灰分和DM的最高氮含量。25 DAH收获的杂草稻和120 kg ha-1的施氮量似乎是合理利用养分、提高生产力和改善全作物杂草稻青贮饲料大部分营养特性的更好组合
Exploiting the potential of weedy rice as value added silage under different nitrogen levels and cutting intervals
Weeds, often considered a “menace” are top-notch, adroit survivors having intrinsic value as source of biodiversity and various promising uses as bio-resource. Among other benefits, their use as feed/food source or raw material is still to be explored. Weedy rice (Oryza sativa f. spontanea) a conspecific of rice has rapid growth, ability to uptake more fertilizer and produce large biomass. Lot of efforts are done for its management but little is known about its nutritive value and utilization as feed source for livestock. Therefore, the present study was carried out at Agronomic Research Area, University of Agriculture, Faisalabad in 2017 and 2018 to optimize N level and harvesting time for improving growth and silage quality of weedy rice sown as sole crop. Treatments comprised of four N levels viz: 0, 100, 120 and 140 kg ha-1 and harvesting intervals viz. 15, 25 and 35 days after heading (DAH). Weedy rice harvested at different intervals after onset of heading stage was used for making silage and analysed for nutritive value. Results depicted that, maximum plant height, fertile tillers, panicle length, kernels per panicle and LA were obtained with 120 kg ha-1 N and harvesting at 25 DAH during both years, while NDF, ADF, cellulose, and hemicellulose were highest with no fertilizer. Crude protein was highest with N application at 120 kg ha-1 and harvesting at 25 DAH. Highest nitrogen contents in plants, plant biomass, WSC, ash and DM in silage were recorded with 140 kg ha-1 N when harvested at 35 DAH. Weedy rice harvested at 25 DAH with N application at 120 kg ha-1 seems to be better combination for rational use of nutrients, better productivity and improving most of the nutritive traits of whole crop weedy rice silage
期刊介绍:
Pakistan Journal of Agricultural Sciences is published in English four times a year. The journal publishes original articles on all aspects of agriculture and allied fields.