Results 81 to 90 of about 17,058 (187)
Shuitu Baochi Xuebao, 2021 为了研究中国西南水梯田的土壤水分特性，以云南哈尼梯田为例，选取哈尼梯田核心区全福庄小流域内林地、荒草地、旱地和水田4种土地利用类型，分层取0—10，10—20，20—40，40—60，60—80，80—100 cm深度土样测其主要土壤理化指标和土壤水分特征曲线，分析其土壤的持水性和水分有效性。结果表明：（1）哈尼梯田4种不同土地利用类型土壤容重变化范围为0.61~1.41 g/cm3，且0—40 cm与40—100 cm差异性显著，土壤有机质含量为1.17%~9.65 ...
李源, 宋维峰, 马建刚
doaj
Geographic risks to functional groups of mammals and birds from habitat loss in Mexico
Conservation Biology, EarlyView.Abstract There is a need to quantify the impact of habitat loss due to anthropogenic factors on different aspects of biodiversity, such as functional trait diversity represented by functional groups (FGs). We developed a metric to assess the weighted risk of loss of habitat for 33 FGs of mammals and 36 FGs of birds in Mexico based on potential ...
Fernando Mayani‐Parás +4 more
wiley +1 more source
Shuitu Baochi Xuebao, 2005 通过田间和室内试验研究了太湖地区3种主要水稻土(白土、黄泥土和乌栅土)的水分特征以及影响因素,得出了各种土壤每一土层的容重、质地、有机质、土壤团聚度、土壤结构系数和土壤水分特征曲线,比较了3种主要水稻土类型的土壤基本物理性质和水分特征状况,并根据水分特征曲线得出了这3种土壤的田间持水量、有效水含量和萎蔫系数。结果表明:土壤田间持水量和有效水含量均与容重呈极显著的线性负相关,有效水与土壤粘粒含量也呈显著的线性负相关;而土壤的田间持水量和有效水含量与土壤有机质、结构系数、团聚度呈极显著的线性正相关 ...
吴华山 陈效民 叶民标 吴华强 施恩培
doaj
Extraction of Pleurotus ostreatus Protein by the Aqueous Two-phase System and Its Characterization [PDF]
To achieve green and efficient extraction of Pleurotus ostreatus protein (PP), the phase diagram of the PEG-(NH4)2SO4 aqueous two-phase system (ATPS) was constructed using the cloud point method.
Huixian XIE +3 more
core +1 more source
Conservation Biology, EarlyView.Abstract Human development is a driver of global change and a major threat to biodiversity. Protected areas maintain and support biodiversity, but outside stressors, such as climate change and land use change, can negatively influence natural resources within protected areas.
Leah J. Rudge +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2008 对3种引进草种的生物量、枯落物量、土壤的容重、孔隙度、自然含水量、毛管持水量、饱和含水量、机械组成、有机质含量、渗透性能和抗蚀能力等进行了测定和分析。结果表明,3种引进草种的水土保持效果依次为纳罗克非洲狗尾草>威提特东非狼尾草>沙弗雷肯尼亚白三叶草,纳罗克非洲狗尾草的持水能力和土壤改良性能最好,是水土保持效果最佳的牧草,可以推广种植,其次是威提特东非狼尾草。
盂广涛 +7 more
doaj
International Journal of Applied Linguistics, EarlyView.ABSTRACT Research on English‐Medium‐Instruction (EMI) highlights inadequate support for students transitioning from L1‐medium‐instruction to EMI. To date, little research has focused on how L2 students’ adaptation to an EMI environment influences their L2 learning motivation (LLM).
Kevin W. H. Tai
wiley +1 more source
Shuitu Baochi Xuebao, 2004 水土保持林的水源涵养效益是研究森林防止水土流失的一个热点问题。以20世纪80年代末期营造和自然恢复的湿地松林、桤柏混交林、刺槐(灌木)林 、刺槐林 和桤木林为研究对象,选择林冠截留、土壤容重、土壤孔隙度、土壤贮水能力、土壤渗透性和枯落物持水性,作为研究不同水土保持林结构模式水源涵养效益的指标,对不同水土保持林的水源涵养机理和水源涵养效益进行了较深入的研究。结果表明,各水土保持林的水源涵养能力均明显高于农耕地;不同水土保持林结构模式的水源涵养效益也有较大差异。最后提出了桤柏混交林、湿地松林 ...
宫渊波 麻泽龙 陈林武 胡庭兴 张健
doaj
Effects of Different High-temperature Treatments on Physicochemical Properties and Taste Quality of Grass Carp Meat [PDF]
This study aimed to study the effects of three current popular high-temperature treatments (electric roasting, air frying and superheated steam) on the physicochemical properties and taste quality of grass carp meat.
Hui WANG +4 more
core +1 more source
Genomic responses to increased temperature and pollinator selection in Brassica rapa L.
New Phytologist, EarlyView.Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
wiley +1 more source