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为了更合理地开发和利用当地有限的耕地资源,维护和提高耕地生产力,采用府谷县2011年“测土配方施肥”项目数据,基于GIS技术平台,综合利用地统计学、特尔斐法、综合评价法等方法,结合“3414”田间肥效试验结果,建立府谷县糜子种植适宜性评价体系。结果表明:对糜子种植而言,府谷县土壤有机质含量偏低(<10g·kg-1),碱解氮含量中等(25~40 mg·kg-1),有效磷含量偏低(5~10 mg·kg-1),速效钾含量中等(70~100mg·kg-1)。研究区耕地糜子种植适宜性水平分异大,高度适宜的耕地面积占总耕地面积的11.20%,适宜占28.99%,二者多沿河流阶地分布;勉强适宜占54.62%,遍布黄土丘陵区;不适宜占5.19%,呈点缀状分布于中部黄土丘陵区。增施碱解氮和有效磷,提高土壤有机质含量,保持土壤速效钾含量,同时注意改善土壤结构,提高土壤抗旱保肥和供肥能力,进一步提高糜子种植适宜性水平。
In order to develop and utilize the limited local cultivated land resources more reasonably and to maintain and improve the productivity of cultivated land, the project data of 2011 Fertigation Soil Testing and Fertilization Program of Fugu County was used to make rational use of the local cultivated land resources. Based on the GIS technology platform and comprehensive utilization of geostatistics, Method, comprehensive evaluation method and other methods, combined with “3414 ” field fertilizer efficiency test results, the establishment of Fugu County Millet planting suitability evaluation system. The results showed that the content of soil organic matter was low (<10g · kg-1), the content of available nitrogen (25-40 mg · kg-1) 10 mg · kg-1) and available potassium (70 ~ 100 mg · kg-1). In the study area, the suitable level of cultivars for cultivation of cultivated land under Micronesia was significantly different. The highly suitable cultivated land area accounted for 11.20% of the total cultivated land area, accounting for 28.99% of the total cultivated land area. Both of them were distributed along the river terrace; barely suitable accounted for 54.62% Not suitable for 5.19%, was dotted distributed in the loess hilly area. Increase of available nitrogen and available phosphorus, increase soil organic matter content, maintain the available potassium content of the soil, pay attention to improving the soil structure, improve the soil drought-resistant and fertilizer-supplying capacity, to further improve the appropriateness of the planting of the millet.