orthic
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Examples of Cevial triangles are the medial triangle and the orthic triangle.
Cevial三角形例子有中线三角形和垂足三角形。
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160 Cm soil layers by soil drill and Nmin concentrations in the soil were measured by flow analysis after CaCl2 extraction. The results showed that NO3--N is the major inorganic nitrogen form in orthic anthrosol soil, and there are no significant differences in soil Nmin accumulation between sole cropping and faba bean/maize intercropping at the co-growth stage.
在田间条件下于2006—2007年研究了不同氮水平下(N 0、75、150、225、300 kg/hm2)蚕豆/玉米间作体系与其相应单作体系土壤无机氮的时空分布规律,旨在为河西走廊灌区蚕豆/玉米间作体系的氮素管理提供理论依据。
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This paper mainly describes from habitat conditions, morphological characteristics, traits, production capacity, a typical cross-section,:Parasalic Aqui-Alkalic Halosols; Parasalic Hapli- Alkalic Halosols;:Para-alkalic Aqui- Orthic Halosols,Gleyic Aqui- Orthic Halosols.so as to provide theoretical basis for research, teaching and production.
本文主要从生境条件,形态特征,性状,生产能力,典型剖面等几个方面介绍弱盐潮湿碱积盐成土,弱盐简育碱积盐成土,弱碱潮湿正常盐成土,潜育潮湿正常盐成土,为土壤的科研、教学和生产提供理论基础。
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The results show that the PSD fractal dimension of Light chestnut soil, Yellow cultivated loessial soil, Orthic dark locssial soil, Orthic cinnamon soil (stratified old manured loessial soil), Fluvo-aquic soil, Orthic gray desert soil, Orthic black soil, Orthic yellow-brown earth, Orthic yellow earth, Orthic ted earth and Orthic lateritic red...
结合上壤颗粒表面分形特性及土壤粘附的基本原理,探讨了土壤PSD分维对土壤—固体表面粘附行为的影响。PSD分维高的土壤与固体表面粘附力大,与固体表面发生明显粘附的起始含水量提高,发生明显粘附的含水量区间增宽。
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The increased amount of non--exchangeable NH4^+-N during the incubation indicated as the following tendency, namely, Eum-Orthic Anthrosols 〉 Los - Orthic Entisols 〉 Hap-Ustic Isohumisols 〉 Ust-Sandiic Entisols. Organic material influenced significantly the increased amount of non-exchangeable NH4^+-N (P was 0.0002, 0.0004 and 0.0003 when incubated at 20 d, 50 d and 60 d, respectively). NH4^+-N increased remarkably when Stlpa bungeana and Medicago sativa were added compared with no addition. The contents of non-exchangeable NH4^+-N increased significantly when added (NH4)2SO4 compared without addition at 20 d, 40 d and 60d of incubation and P was 0.0037, 0.0033 and 0.0027, respectively. It was the result that the NH4^+-N from (NH4)2 SO4 was fixed within the soil. The increased amount of non-exchangeable NH4^+-N increased significantly for different soils, on which different vegetation types grew before the collection of soil samples, when incubated at 20 d (P=0.0434), but not significantly at 40 d and 60d (P=0.7378 and 0.5375). The increased amount of non-exchangeable NH4^+-N in the soil, on which crop straw and nitrogen fertilizer had been incorporated for a long-term period, was larger than that of no addition, but it was not significantly different among these two fertilization models. Soil clay, total N and organic matter were positively correlated remarkably with the contents of non-exchangeable NH4^+-N, the increased amount of non-exchangeable NH4^+-N had no correlation with soil clay, whereas it had significantly positive correlation with total N and organic matter.
培养期间非交换性NH4^+-N的增加量均表现为以土垫旱耕人为土最大,其次是黄土正常新成土,简育干润均腐土和干湿砂质新成土较小;添加有机物料极显著影响培养期间的非交换性NH4^+-N增加量(培养20d、40d和60d时P分别为0.0002,0.004和0.0003),表现为紫花苜蓿和长芒草土壤非交换性NH4^+-N的增加量均极显著高于不添加有机物料的对照土壤;在培养20d、40d和60d时,加(NH4)2SO4土样非交换性NH4^+-N的增加量显著大于不加(NH4)2SO4土样(户分别为0.0037,0.0033和0.0027),这是土壤对(NH4)2SO4中NH4^+-N固定的必然结果;不同植被类型土壤培养20d时的非交换性NH4^+-N增加量差异显著(P=0.0434),培养40d和60d时差异不显著(p分别为0.7378和0.5375);长期秸秆和氮肥配施土壤非交换性NH4^+-N增加量大于不施肥对照土壤,但差异不显著土壤黏粒、全氮和有机质与培养0d、20d、40d和60d时土壤的非交换性NH4^+-N含量均呈极显著正相关;而非交换性NH4^+-N的增加量与粘粒无相关性,但与全氛和有机质呈显著正相关。
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orthic solonetz:典型碱土
orthic solonchaks 典型盐土 | orthic solonetz 典型碱土 | orthid 典型旱成土
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orthic greyzems:典型灰色森林土
orthic ferralsols 典型铁铝土 | orthic greyzems 典型灰色森林土 | orthic luvisols 典型淋溶土
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orthic luvisols:典型淋溶土
orthic greyzems 典型灰色森林土 | orthic luvisols 典型淋溶土 | orthic podzols 典型灰壤
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orthic solonchaks:典型盐土
orthic podzols 典型灰壤 | orthic solonchaks 典型盐土 | orthic solonetz 典型碱土
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orthic podzols:典型灰壤
orthic luvisols 典型淋溶土 | orthic podzols 典型灰壤 | orthic solonchaks 典型盐土
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