4) neutral purple soil
中性紫色土
1.
In a pot experiment,3 soils(acidic yellow soil,neutral purple soil and calcareous purple soil),mixed up with peat,vermiculite,rice husk,sawdust or sand,were used as growth media to study their effects on the growth of Eucalyptus maideni F.
以酸性黄壤、中性紫色土、钙质紫色土3种土壤,以及草炭、蛭石、谷壳、锯末、河沙等为主要基质,按照不同比例配制,进行直杆蓝桉容器育苗实验。
2.
Organic-inorganic compound fertilizers were applied to 2 neutral purple soils in Chongqing to study their effects on the yield and nitrogen recovery of the rice crop and on nutrient content in the soil.
在重庆地区 2种代表性中性紫色土上 ,研究有机无机复混肥对水稻产量、氮素利用率及土壤养分的影响。
5) purple soils in China
中国紫色土
1.
Approach to microstructure of purple soils in China --Concurrent study on its application in lower category of soils of soil taxonomy;
中国紫色土的微结构研究——兼论在ST制土壤基层分类上的应用
6) purple soil
紫色土
1.
Competitive sorp-desorption of zinc and cadmium in purple soil;
锌、镉在紫色土中的竞争吸附
2.
Response of sediment flow behavior to storm type and spatial scale in purple soil watershed;
紫色土区小流域泥沙输出过程对雨型和空间尺度的响应
3.
Characteristics of runoff generation and its numerical simulation of surface flow in hilly area with purple soil under convetional tillage systems;
四川丘陵区常规耕作制下紫色土径流发生特征及其表面流数值模拟
补充资料:紫色土
紫色土 purplish soil 发育于亚热带地区石灰性紫色砂页岩母质土壤。全剖面呈均一的紫色或紫红色,层次不明显。主要分布在中国的亚热带地区,以四川盆地为主。紫色土是在频繁的风化作用和侵蚀作用下形成的,其过程特点是:物理风化强烈、化学风化微弱、石灰开始淋溶。紫色土土层浅薄,通常不到50厘米,超过1米者甚少。一般含碳酸钙,呈中性或微碱性反应。有机质含量低,磷、钾丰富。由于紫色土母岩松疏,易于崩解,矿质养分含量丰富,肥力较高,是中国南方重要旱作土壤之一,除丘陵顶部或陡坡岩坎外,均已开垦种植。因侵蚀和干旱缺水现象时有发生,利用时需修建梯田和蓄水池,开发灌溉水源。开辟肥源以增加土壤有机质和氮的含量,也是提高其生产力的重要措施。
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