Results 11 to 20 of about 5,604 (149)

Greenhouse gas emissions from croplands of China [PDF]

open access: yes, 2003
China possesses cropland of 1.33 million km 2. Cultivation of the cropland not only altered the biogeochemical cycles of carbon (C) and nitrogen (N) in the agroecosystems but also affected global climate.
Bohan, Liao   +13 more
core   +1 more source

Eyes on nature: Embedded vision cameras for terrestrial biodiversity monitoring

open access: yesMethods in Ecology and Evolution, Volume 15, Issue 12, Page 2262-2275, December 2024.
Abstract We need comprehensive information to manage and protect biodiversity in the face of global environmental challenges, and artificial intelligence is required to generate that information from vast amounts of biodiversity data. Currently, vision‐based monitoring methods are heterogenous; they poorly cover spatial and temporal dimensions, overly ...
Kevin F. A. Darras   +11 more
wiley   +1 more source

Genetic Analysis on Grain Shape and Mapping, Cloning and Characterizing of Major Grain length Gene in rice [PDF]

open access: yes, 2014
水稻是世界上最重要的禾谷类作物之一,提高水稻产量和改善稻米品质是水稻遗传与育种研究的永恒主题。水稻粒形是粒长、粒宽、长宽比及粒厚的综合性状,是稻米外观品质的重要指标,同时对稻米的碾磨品质、食味品质及产量均有重要影响。厦门大学水稻遗传育种研究室长期致力于大粒优质水稻新品种的遗传与育种研究,前期采用60Co-γ射线辐照水稻成熟花粉诱变方法,获得了一批遗传上稳定的长粒大粒水稻种质材料并广泛应用于优质籼稻育种中。为了解这些大粒材料谷粒性状的遗传基础,本研究选择其中的三个大粒品系JF171、JF178 ...
黄荣裕
core  

基于Scopus的植物表型组学研究进展分析 [PDF]

open access: yes, 2018
Bibliometric analyses are capable of demonstrating the history and the tendency of scientific and technological development. This article aims to use big scientific data to explore the present status of plant phenomics, based on which sound ...
Chen, Rongrong   +7 more
core   +1 more source

分次施氮对水稻根际土壤微生物生态效应的影响

open access: yesShuitu Baochi Xuebao, 2006
研究了分次施氮条件,施氮对水稻根际土壤微生物生态效应的影响,结果表明:水稻根际土壤微生物生态效应不仅仅受到根际土壤微生物的影响,同时也受到水稻生长状态的影响。一般来说,水稻生长旺盛的时候,水稻根系与根际土壤微生物竞争营养元素,导致水稻根际微生物活性的下降。在水稻生长周期内,水稻根际土壤微生物生物量C与根际土壤酶等变化不一致。分次施氮条件下,施氮对根际微生物生物量C、磷酸酶、脲酶、总蛋白和总酚有一定的影响,尤其是在水稻生长的后期,4次施氮全部完成后,施氮与不施氮表现出明显的差异。
汪华, 杨京平, 徐伟, 马维娜
doaj   +2 more sources

Trade‐off between soil carbon sequestration and net ecosystem economic benefits for paddy fields under long‐term application of biochar

open access: yesGCB Bioenergy, Volume 16, Issue 1, January 2024.
The use of biochar increased greenhouse gas (GHG) emissions but countered the harm caused by GHG emissions by considerable soil carbon sequestration resulting in a negative carbon footprint. Furthermore, the use of biochar lowered the proportion of CH4 and N2O, demonstrating that biochar usage has a considerable positive effect on GHG emissions ...
Zhuoxi Chen   +4 more
wiley   +1 more source

The Role of Messenger RNA Alternative Polyadenylation During Developmental Gene Expression Regulation and Adapdation of Rice [PDF]

open access: yes, 2016
水稻(Oryzasativa)不仅是世界上最重要的粮食作物之一,也是单子叶模式植物。水稻品种japonicaNipponbare和indica93-11为两个水稻亚种代表,广泛的种植于我国的南北区域,对环境与气候形成一定的适应性,在我国形成北粳南籼的生产格局。它们各自具有独自的生理特性和生长周期。转录组为特定生理条件下,细胞中全部转录产物的集合。通过对水稻发育过程转录组的研究,可以全面地了解基因表达调控在水稻发育过程中的调节作用以及对环境适应性。多聚腺苷化是基因在转录形成成熟的转录本之前的加工过程之一 ...
付海辉
core  

Identification of Rice Dwarf Mutant and Fine Mapping of mhd1 Gene [PDF]

open access: yes, 2016
株高是水稻株型重要的组成因子,直接关系到水稻的产量,株高过高易引起植株倒伏导致减产,适当矮化则可以达到抗倒、增产的目的。虽然目前已经鉴定不少与水稻矮秆相关的基因,但是能够在生产上实际应用的矮秆主基因仍以sd1为主。因此,寻找和创造能在生产上利用的矮秆种质资源以及研究矮化相关机制具有重要的理论和实践意义。 本研究的材料源于籼稻品种闽恢3301经EMS诱变产生的小粒矮秆突变体,暂命名为mhd1(Minhui3301dwarf1)。mhd1表现出多个异常表型,包括植株矮化、叶片直立变宽、叶色深绿、穗和谷粒较小,
陈伟刚
core  

Study on Alleviation Mechanism of Hydrogen Sulfide on Copper Stress in Rice Seedlings [PDF]

open access: yes, 2015
硫化氢(hydrogensulfide,H2S)是继一氧化氮(nitricoxide,NO)、一氧化碳和(carbonmonooxide,CO)之后被广泛关注的气体信号分子,低浓度的H2S在动物、植物和微生物中被证实参与了众多生理生化过程,调节了有机体的生长发育。H2S在植物应对盐害、干旱、重金属胁迫、冷热胁迫中发挥重要作用,增强植物对逆境的抵抗力。 铜污染是环境污染中不容忽视的一类重金属污染。本文中,我们以水稻(Oryzasativa)为材料,研究了H2S对铜胁迫的影响。结果显示低浓度的H2S ...
尹珊珊
core  

Breeding Aromatic Rice Restorer by Specific Fragrant Molecular Marker-assisted Selection [PDF]

open access: yes, 2015
水稻是最重要的粮食作物之一,香稻因其米饭清香、口感好以及市场价格高等优势而倍受人们青睐。由于传统香稻品种大多产量低、抗性弱且有地域性限制,导致其推广种植面积受到限制;而且传统的香稻育种方式耗时长、准确率低,使香稻品种的开发缓慢低效。随着分子生物技术的飞速发展,借助分子标记辅助选择开展香稻育种可以提高香味选择准确率,加快育种进程。为此,本研究应用分子标记辅助选择技术与传统育种技术相结合的方法,选用优良水稻恢复系福恢673、明恢86和闽恢3301为受体亲本,分别与香味基因供体亲本优质香稻品种象牙香占杂交 ...
高筱莎
core  

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