关键词: 鱼腥草, 鱼腥草, 氮肥, 有机肥, 产量, 品质

Abstract: The paper aims to analyze the climate variation characteristics of deep geotemperature in Hainan Area, Qinghai for 33 years. The author used the monthly mean geotemperature data of 0.8, 1.6, 3.2 m from 1982 to 2014 in Hainan Meteorological Station, and studied its change rule. The results showed that the deep geotemperature had very significant upward trend in recent 33 years in Hainan Area, but the situation was not in accordance with the seasonal changes, the deep geotemperature of 0.8 m and 1.6 m in summer was the strongest, and the increase rate of the deep geotemperature of 3.2 m in spring was rather high. Average annual changing trend of shallow and deep geotemperature on time scales were highly consistent. Temperature was one of the main influencing factors of the deep geotemperature change, and there was an extremely and significantly positive correlation between the two, which maintained a high degree of consistency on change scale. Total cloud cover had certain positive influence on the change of the deep geotemperature, the change of the deep geotemperature was affected by the change of low cloud cover obviously. The author used MannKendall test to detect the mutation phenomenon of deep geotemperature sequence in Hainan, it was found that deep geotemperature of 0.8, 1.6 and 3.2 m had obviously rising mutation in 1998.