摘要
对延安地区不同类型土壤、不同类型田块的耕层有效钼及一些重要土壤中有效钼的剖面分布进行了分析，以确定有效钼的水平及垂直分布；与此同时，进行了主要作物的钼肥肥效试验，确定在本地条件下不同作物对钼肥的反应。研究表明，除个别土壤、个别县外，延安地区土壤有效钼含量偏低，变动在０．０１３～０．６３２ｍｇ／ｋｇ范围内。就土壤类型来看，黑垆土、河淤土、红胶土含量较高，黄绵土次之；就土壤分布位置来看，川台地和川地较高，而坡源地较少。除过红色土下层有效钼含量较高外，其它土壤无明显的层次分异。施用钼肥能显著地提高大豆、玉米、小麦、谷子的产量，也能明显地提高籽粒中的钼素含量。
The contents of available Mo in different soils and on different lands in the
Yanan district were investigated in order to understand its horizontal distribution,and the
contents of the available Mo in soil profiles of some major soils wers also investi-gated to
understand its vertical distribution. At the same time , pot and filed trials werecarried out to
study the effectiveness of application of Mo fertilizer on crop yields and onMo uptake by
plants. The results obtained show that except in a few soils and in a fewcounties ,the available
Mo contents in the district were not high , ranging from 0.013mg/kg to 0.632mg/kg with an
average of 0.088 mg/kg. Ag far as the soil types areconserned,the Black Lou soil,the Red
alluvial soil and the river alluvial soil were high-er,followed by the Yellow cotton soil.In
addition to soil types,the contents were alsochangedwith land distribution:it was higher on
table-vallay lands,but lower on slop-ing lands and mountainous lands. With the exception of
the Red clayey soil,there is nodifferences in available Mo in soil profile. Both the grain yields
and the Mo contents ingrain of soyabean,wheat,maize and millet were significantly increased
by application ofMo fertilizer.
出处
《干旱地区农业研究》
CSCD
北大核心
1994年第4期77-82,共6页
Agricultural Research in the Arid Areas
基金
陕西省农牧资助
关键词
土壤有效钼
耕层钼
分布
钼肥
作物产量
Available Mo in soil,distribution, Mo fertilizer crop
yields
