Meanwhile, slope gradient had a great impact on purple soil erosion processes.
同时，坡面坡度对紫色土坡面侵蚀过程有重要的影响。
The measuring soil sample chooses the purple soil which wide distribute in southwest.
被测土样选择在西南地区广泛分布的紫色土。
Purple Soil distributed widely in China, especially in upper reaches of the Yangtze River.
紫色土在我国分布较广，特别是长江上游地区。
Hengyang city is one of the main distributive regions of the purple soil in Hunan province.
衡阳市是湖南省紫色土的主要分布区之一。
Paddy soil had significantly higher contents of TN and AN than yellow soil and purple soil.
水稻土全氮和碱解氮含量均极显著高于黄壤和紫色土；
Purple soil sloping farmland is the important land resources in three gorges reservoir region.
紫色土坡耕地是三峡库区重要的土地资源。
But the structure of purple soil parent material is loose and easy to efflorescent, anti-erodibility;
但紫色土成土母岩结构疏松，易风化，抗蚀性低；
The agricultural and physiological efficiencies of grain yield were maximum in calcareous purple soil.
对小麦籽粒产量的农业和生理效率以石灰性紫色土为最高。
Purple soil supplied the plants with more phosphorus and potassium nutrition and less nitrogen nutrition.
紫色类土壤提供给烟株吸收利用的磷钾养分较多，而氮养分较少。
Whether was potassium balance kept in purple soil cornfield ecosystem under a rotation of rice and wheat?
稻—麦轮作期紫色土农田生态系统钾素平衡状况怎样？
Adsorption of chlorpyrifos on humic acid (HA) of neutral purple soil was studied through balance vibration method.
通过平衡振荡法研究毒死蜱在中性紫色土腐殖酸(HA)上的吸附。
Soil physicochemical properties under 4 different land utilization types in a purple soil hilly region were analyzed.
依据定位观测数据，对紫色土丘陵区农用地土壤水分的动态变化规律进行了初步研究。
The effects of nitrogen on cotton yield and fiber quality in purple soil have been investigated by pot and field test.
通过盆栽试验、田间试验研究了紫色土壤施氮对棉花产量品质的效应。
The pattern of potassium uptake by the rice crop in its growing period and the dynamics of potassium in purple soil were studied.
研究了水稻吸钾规律及其生育期内紫色土钾素动态变化。
The characteristics of soil and water loss and crop yield by cross ridge in purple soil of different sloping farmland were studied.
通过在紫色土坡耕地上进行横坡垄作，观测了不同坡度坡耕地的水土流失及作物产量状况。
The results showed that the rainfall infiltration features have significant difference among different land use types on purple soil.
结果表明，紫色土不同土地利用方式下降雨入渗过程差异显著。
Potassium fertilizer should be applied to red-brown-purple soil especially paddy soil to supplement and maintain the K level in soil.
灰棕紫泥和红棕紫泥有较强的供钾潜力，红棕紫泥尤其是红棕紫泥水稻土必须注意施用钾肥以补充和维持土壤的钾素水平。
Soil in hilly regions in the middle of Sichuan Province is mainly a type of purple soil which has been developed from the purple shale rock.
川中丘陵区地表以紫色沙页岩风化形成的紫色土壤为主，基岩风化剥蚀过程与流失过程交替进行。该区垦殖率高，植被盖度低，地形破碎，土地利用结构复杂，土壤侵蚀严重。
The effect of lignin and lignin-compound fertilizer on the yield of wheat was researched through field experiment in purple soil and moisture soil.
在潮土和紫色土两种土壤上，比较研究了硫代木质素及其复合肥料对小麦产量的影响。
The main chemical properties of yellow soil and acid purple soil in tea gardens in the west of sichuan province, are fully described and analysized.
本文论述了四川省西部植茶的黄壤和酸性紫色土的重要化学性质和茶树产量的关系。
The result showed that the heavy metal pollution have existed in purple soil area, and it was most obviously at the mining areas and big city suburbs.
结果表明，紫色土区已存在重金属污染问题，尤以矿区和大城市近郊最为明显。
The formation and emergence of redbeds are analyzed from the geological perspective and the possible distribution of purple soil is discussed in this paper.
从地质角度分析了红层的形成与出露，阐述了紫色土的可能分布。
Therefore, many scholars in China studied on the purple soil erosion, erosion mechanism and influence factors such as the field and has made great progress.
因此，我国众多学者对紫色土侵蚀规律、侵蚀机理及其影响因素等方面展开了研究，取得了较大的进展。
The problem of severe soil and water loss in the purple soil area is adverse to eco-environment construction and safety in upper reaches of the Yangtze River.
但紫色土分布区的水土流失问题较为严重，对长江上游生态环境建设和安全都有不利影响。本文论述了紫色土的侵蚀和泥沙形成流失的特点。
The researches were captured by sampling investigation on soil animals in purple soil of 3 kinds of different habitat in Qidong county, Hunan during 2001-2002.
2002年，对湖南省祁东县紫色土分布区按不同生境设3个样区进行土壤动物调查。
Based on the data of observation in fixed location, the pilot study on soil moisture dynamic variation law of farmland in purple soil hilly region has been done.
依据定位观测数据，对紫色土丘陵区农用地土壤水分的动态变化规律进行了初步研究。
Purple soil is one of the most important land resources in upper reaches of the Yangtze River, however, the severe soil and water loss caused a series of problems.
紫色土是长江上游最重要的土地资源之一，严重的水土流失引发了一系列问题。
The typical and representative purple soils in Sichuan Basin are red purple soil (acidic), gray-brown purple soil (neutral), and red-brown purple soil (calcareous).
红紫泥、灰棕紫泥、红棕紫泥依次是四川盆地典型具有代表性的酸性、中性和石灰性紫色土。
Mixed alder and cypress forest is a main mixed type on purple soil, playing an important role in the construction of protection forests in the Changjiang River basin.
桤柏混交林是紫色土的主要人工混交类型，在长江防护林建设中有重要作用。
Soil erosion is a main factor of soil degradation of purple soil sloping field in the Three Gorges reservoir area, and therefore leads to soil coarseness and acidification.
土壤侵蚀是三峡库区紫色土坡地土壤退化的主因，并由此造成土壤粗骨沙化和酸化。
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