CAJ | 학술논문

定点取样测定黄土高原丘陵沟壑区(定西安定区)天然草原和种植红豆草Onobrychis viciaefolia、小麦Triticum aestivum、马铃薯Solanum tuberosum土壤的几项主要营养指标.结果表明:在0~20 cm土层中,天然草地土壤含水量最高,较红豆草、小麦和马铃薯土壤含水量高5.6%～21.8%,差异显著或极显著;种植2年红豆草的草地土壤全氮含量达到1 367 mg/kg,高于其他植物群落的土壤相关指标,且建植2年红豆草土壤指标高于当年建植的红豆草,差异显著;不同植物群落有效磷含量差异不显著;各类型土壤在4月、6月和8月的有机质和有效磷含量呈现不同的变化趋势,土壤pH值变化平稳.
정점취양측정황토고원구릉구학구(정서안정구)천연초원화충식홍두초Onobrychis viciaefolia、소맥Triticum aestivum、마령서Solanum tuberosum토양적궤항주요영양지표.결과표명:재0~20 cm토층중,천연초지토양함수량최고,교홍두초、소맥화마령서토양함수량고5.6%～21.8%,차이현저혹겁현저;충식2년홍두초적초지토양전담함량체도1 367 mg/kg,고우기타식물군락적토양상관지표,차건식2년홍두초토양지표고우당년건식적홍두초,차이현저;불동식물군락유효린함량차이불현저;각류형토양재4월、6월화8월적유궤질화유효린함량정현불동적변화추세,토양pH치변화평은.
Soil nutrition of a natural grassland and three field cropped sainfoin, wheat and potato was assayed in the hills and dongas area of Loess Plateau in Anding District, Dingxi City. The results showed that soil water content in the natural grassland in the 0-20 cm soil layer increased by 5.6%~21.8% than that of the crop lands (P<0.05 or P<0.01), Total nitrogen content in the two years sainfoin soil was up to 1 367 mg/kg,which was higher than the 1-years sainfoin soil, and other soil (P<0.05). Effective phosphor content varied in different soil but difference did not significant. Organic matter and phosphor in each soil varied with the same trend from April to June and August, however, pH changed very little.