本文主要研究内容
作者郝舒雪（2019）在《不同生育期水分胁迫及复水对番茄生理特性、品质及产量的影响》一文中研究指出：番茄是我国设施栽培的重要蔬菜,对水分极为敏感,且其生育期较长,不同生长阶段对水分的需求差异较大。针对番茄的需水规律,在其不同的生长阶段对其进行水分胁迫对于水资源的节约和高效利用具有十分重要的意义。试验于2017年2月在温室中进行,设置充分灌溉W(70-80%θ_田)、轻度水分胁迫W1(50-60%θ_田)、中度水分胁迫W2(40-50%θ_田)三种灌水处理及苗期S、花期A、果实膨大期F三个生育期设置,探讨番茄在三个不同生长时期进行连续18天水分胁迫及随后3天复水处理对番茄生理特性的影响,及确定各处理下不同穗番茄果实的品质与产量的差异与综合排名,为实现番茄的优质高效生产奠定基础。通过番茄桶栽试验及指标观测得出以下主要结论:1、大多数光合指标在水分胁迫下均呈下降趋势,在同一生长时期,轻度水胁迫的光合指标值均高于中度水胁迫。此外,各指标最终在复水处理后基本均恢复至初始值。瞬时水分利用效率(iWUE)在水分胁迫的最后一天达到峰值。净光合速率(Pn)与蒸腾速率(E)、Pn与气孔导度(Gs)呈显著的线性正相关关系。2、番茄叶片及根系中的超氧化物歧化酶(SOD)、过氧化物酶(POD)与过氧化氢酶(CAT)活性在全生育期水分胁迫下均持续升高,复水后得以恢复。番茄整个生育期中,叶片的SOD活性高于根系,而叶片中的POD、CAT活性低于根系。随着番茄生育期的推进,Pn值随着抗氧化酶活性的增加而降低,且Pn与抗氧化酶活性呈极显著的相关性。3、气孔长度(SL)和气孔宽度(SW)在各生育期水分胁迫下均呈下降趋势,而气孔密度(SD)则不同,水分胁迫处理下SD呈上升趋势。Pn与SW呈显著的抛物线关系;相反的,Pn与SD呈极显著的线性负相关。4、同时,试验确定了不同生长阶段下不同穗果在水分胁迫及复水下番茄品质及产量的响应;并对第二、三穗果实的品质和产量进行了综合评价。结果显示,一定时期的水分胁迫对提高番茄果实品质有重要的作用,但不可避免会造成其产量的下降。同一生育期下,大部分品质指标在轻度水分胁迫下高于中度水分胁迫。水分处理下番茄的可溶性糖(SS)、可溶性固形物(TSS)、维生素C(VC)和硬度(F)均显著高于对照,果实品质明显提高。水分胁迫与生育期的交互作用对SS和TSS有显著影响。在番茄的生长后期,水分胁迫显著提高了番茄果实的SS和TSS含量。番茄品质在第二穗和第三穗间存在显著差异,尤其表现在SS、有机酸(OA)与番茄红素(L)的含量上。与三穗果相比,二穗果的风味品质较优,而三穗果的外观品质较优。水分胁迫下二穗果的产量降低9.16%~35.04%;三穗果产量降低7.85%~23.40%,早期进行轻度胁迫处理对其影响较小。5、采用主成分分析(PCA)及灰色关联度(GRA)法对番茄不同穗果品质进行综合评价,结果显示,二、三穗果及两穗果的品质平均值在两种方法的评估下排名第一的处理均为W1F。通过秩和比法(RSR)对番茄品质及产量综合评估的结果显示,二穗果及两穗果平均值的品质最佳处理基于PCA、GRA均为W1F;而三穗果的品质最优处理基于PCA为W1F,基于GRA为W1S处理。6、虽然水分胁迫对番茄的生理指标存在负面影响,但这种影响并非是不可逆的,因为水分胁迫对番茄生理指标的影响在复水后均得到了一定程度的恢复,部分指标甚至恢复至初始水平。花期进行水分胁迫对生理指标的影响大于苗期与果实膨大期。综合考虑以上因素,证实轻度水分胁迫对番茄非关键生长期(苗期或果实膨大期)生理指标的影响不显著,与充分灌溉相比,轻度水分胁迫对番茄生理指标的影响不显著。水分胁迫显著提高了番茄的品质,但无论在哪个生长阶段进行水分胁迫均不可避免地降低其产量。在果实膨大期施加轻度水分胁迫(W1F)是提高果实品质和产量的最佳措施。
Abstract
fan jia shi wo guo she shi zai pei de chong yao shu cai ,dui shui fen ji wei min gan ,ju ji sheng yo ji jiao chang ,bu tong sheng chang jie duan dui shui fen de xu qiu cha yi jiao da 。zhen dui fan jia de xu shui gui lv ,zai ji bu tong de sheng chang jie duan dui ji jin hang shui fen xie pai dui yu shui zi yuan de jie yao he gao xiao li yong ju you shi fen chong yao de yi yi 。shi yan yu 2017nian 2yue zai wen shi zhong jin hang ,she zhi chong fen guan gai W(70-80%θ_tian )、qing du shui fen xie pai W1(50-60%θ_tian )、zhong du shui fen xie pai W2(40-50%θ_tian )san chong guan shui chu li ji miao ji S、hua ji A、guo shi peng da ji Fsan ge sheng yo ji she zhi ,tan tao fan jia zai san ge bu tong sheng chang shi ji jin hang lian xu 18tian shui fen xie pai ji sui hou 3tian fu shui chu li dui fan jia sheng li te xing de ying xiang ,ji que ding ge chu li xia bu tong sui fan jia guo shi de pin zhi yu chan liang de cha yi yu zeng ge pai ming ,wei shi xian fan jia de you zhi gao xiao sheng chan dian ding ji chu 。tong guo fan jia tong zai shi yan ji zhi biao guan ce de chu yi xia zhu yao jie lun :1、da duo shu guang ge zhi biao zai shui fen xie pai xia jun cheng xia jiang qu shi ,zai tong yi sheng chang shi ji ,qing du shui xie pai de guang ge zhi biao zhi jun gao yu zhong du shui xie pai 。ci wai ,ge zhi biao zui zhong zai fu shui chu li hou ji ben jun hui fu zhi chu shi zhi 。shun shi shui fen li yong xiao lv (iWUE)zai shui fen xie pai de zui hou yi tian da dao feng zhi 。jing guang ge su lv (Pn)yu zheng teng su lv (E)、Pnyu qi kong dao du (Gs)cheng xian zhe de xian xing zheng xiang guan guan ji 。2、fan jia xie pian ji gen ji zhong de chao yang hua wu qi hua mei (SOD)、guo yang hua wu mei (POD)yu guo yang hua qing mei (CAT)huo xing zai quan sheng yo ji shui fen xie pai xia jun chi xu sheng gao ,fu shui hou de yi hui fu 。fan jia zheng ge sheng yo ji zhong ,xie pian de SODhuo xing gao yu gen ji ,er xie pian zhong de POD、CAThuo xing di yu gen ji 。sui zhao fan jia sheng yo ji de tui jin ,Pnzhi sui zhao kang yang hua mei huo xing de zeng jia er jiang di ,ju Pnyu kang yang hua mei huo xing cheng ji xian zhe de xiang guan xing 。3、qi kong chang du (SL)he qi kong kuan du (SW)zai ge sheng yo ji shui fen xie pai xia jun cheng xia jiang qu shi ,er qi kong mi du (SD)ze bu tong ,shui fen xie pai chu li xia SDcheng shang sheng qu shi 。Pnyu SWcheng xian zhe de pao wu xian guan ji ;xiang fan de ,Pnyu SDcheng ji xian zhe de xian xing fu xiang guan 。4、tong shi ,shi yan que ding le bu tong sheng chang jie duan xia bu tong sui guo zai shui fen xie pai ji fu shui xia fan jia pin zhi ji chan liang de xiang ying ;bing dui di er 、san sui guo shi de pin zhi he chan liang jin hang le zeng ge ping jia 。jie guo xian shi ,yi ding shi ji de shui fen xie pai dui di gao fan jia guo shi pin zhi you chong yao de zuo yong ,dan bu ke bi mian hui zao cheng ji chan liang de xia jiang 。tong yi sheng yo ji xia ,da bu fen pin zhi zhi biao zai qing du shui fen xie pai xia gao yu zhong du shui fen xie pai 。shui fen chu li xia fan jia de ke rong xing tang (SS)、ke rong xing gu xing wu (TSS)、wei sheng su C(VC)he ying du (F)jun xian zhe gao yu dui zhao ,guo shi pin zhi ming xian di gao 。shui fen xie pai yu sheng yo ji de jiao hu zuo yong dui SShe TSSyou xian zhe ying xiang 。zai fan jia de sheng chang hou ji ,shui fen xie pai xian zhe di gao le fan jia guo shi de SShe TSShan liang 。fan jia pin zhi zai di er sui he di san sui jian cun zai xian zhe cha yi ,you ji biao xian zai SS、you ji suan (OA)yu fan jia gong su (L)de han liang shang 。yu san sui guo xiang bi ,er sui guo de feng wei pin zhi jiao you ,er san sui guo de wai guan pin zhi jiao you 。shui fen xie pai xia er sui guo de chan liang jiang di 9.16%~35.04%;san sui guo chan liang jiang di 7.85%~23.40%,zao ji jin hang qing du xie pai chu li dui ji ying xiang jiao xiao 。5、cai yong zhu cheng fen fen xi (PCA)ji hui se guan lian du (GRA)fa dui fan jia bu tong sui guo pin zhi jin hang zeng ge ping jia ,jie guo xian shi ,er 、san sui guo ji liang sui guo de pin zhi ping jun zhi zai liang chong fang fa de ping gu xia pai ming di yi de chu li jun wei W1F。tong guo zhi he bi fa (RSR)dui fan jia pin zhi ji chan liang zeng ge ping gu de jie guo xian shi ,er sui guo ji liang sui guo ping jun zhi de pin zhi zui jia chu li ji yu PCA、GRAjun wei W1F;er san sui guo de pin zhi zui you chu li ji yu PCAwei W1F,ji yu GRAwei W1Schu li 。6、sui ran shui fen xie pai dui fan jia de sheng li zhi biao cun zai fu mian ying xiang ,dan zhe chong ying xiang bing fei shi bu ke ni de ,yin wei shui fen xie pai dui fan jia sheng li zhi biao de ying xiang zai fu shui hou jun de dao le yi ding cheng du de hui fu ,bu fen zhi biao shen zhi hui fu zhi chu shi shui ping 。hua ji jin hang shui fen xie pai dui sheng li zhi biao de ying xiang da yu miao ji yu guo shi peng da ji 。zeng ge kao lv yi shang yin su ,zheng shi qing du shui fen xie pai dui fan jia fei guan jian sheng chang ji (miao ji huo guo shi peng da ji )sheng li zhi biao de ying xiang bu xian zhe ,yu chong fen guan gai xiang bi ,qing du shui fen xie pai dui fan jia sheng li zhi biao de ying xiang bu xian zhe 。shui fen xie pai xian zhe di gao le fan jia de pin zhi ,dan mo lun zai na ge sheng chang jie duan jin hang shui fen xie pai jun bu ke bi mian de jiang di ji chan liang 。zai guo shi peng da ji shi jia qing du shui fen xie pai (W1F)shi di gao guo shi pin zhi he chan liang de zui jia cuo shi 。
论文参考文献
论文详细介绍
论文作者分别是来自西北农林科技大学的郝舒雪，发表于刊物西北农林科技大学2019-07-11论文，是一篇关于番茄论文,水分胁迫论文,生理指标论文,生育期论文,品质论文,产量论文,西北农林科技大学2019-07-11论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自西北农林科技大学2019-07-11论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：番茄论文; 水分胁迫论文; 生理指标论文; 生育期论文; 品质论文; 产量论文; 西北农林科技大学2019-07-11论文;