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固原地区属干旱半干旱气候带,旱作农业占耕地面积的94.1％。农业生产结构单一,耕作粗放,半数以上农田无肥可施,地力瘠薄,产量低而不稳,我们认为地力不足是生产水平不能提高的主要限制因素之一。根据本区土地资源丰富的优势,调整农业结构,促进种草、畜牧同步发展,增加有机肥源,以有机配合无机,是提高半干旱农田土壤生态环境根本途径。为此于1982年开始,探讨在有限降水的气候条件下,有机、无机肥料配合比与作物产量、耗水系数之间关系,以期获得具有较高效益的用肥方案。
Guyuan area is arid and semi-arid climatic zone, dry farming accounted for 94.1% of arable land area. With a single agricultural production structure and extensive farming, more than half of the farmland is fertile, infertile and low-yielding. We think that insufficient land productivity is one of the major limiting factors in the failure to raise production levels. According to the abundant land resources in this area, it is an essential way to improve the ecological structure of semi-arid farmland so as to adjust the agricultural structure, promote the simultaneous development of grass and animal husbandry, increase the organic manure source and organic compound inorganic. To this end in 1982, to explore the relationship between the organic and inorganic fertilizer mix and crop yield and water consumption coefficient in the limited precipitation climatic conditions, in order to obtain a higher efficiency fertilizer program.