【摘要】：為了解青海省興�？h天然草地牧草生長(zhǎng)發(fā)育及其與氣候條件的關(guān)系,本研究基于青海省興海縣近11年的氣象和牧草觀測(cè)數(shù)據(jù),較系統(tǒng)地分析了該區(qū)牧草返青、生長(zhǎng)高度和產(chǎn)量與水熱因子的關(guān)系特征。結(jié)果表明,春季多雨與春季干旱年份牧草返青期相差38d,牧草返青期提前或推遲主要與≥0℃初日的時(shí)間、當(dāng)年3-4月份降水量和上年9-11月份降水量密切相關(guān),牧草返青期降水的最佳氣候模型為一次線性回歸方程;牧草全生育期植物高度增加量與降水呈顯著正相關(guān)關(guān)系(P0.05),而與氣溫呈負(fù)相關(guān)關(guān)系;另外,牧草生長(zhǎng)高峰期6-7月份降水量每增加10 mm,鮮草增產(chǎn)225kg·hm~(-2)。因此,降水量是限制青海省興�？h天然草地牧草返青和生長(zhǎng)發(fā)育的主要?dú)庀笠蜃印?br/>[Abstract]:In order to understand the relationship between the growth and development of natural grassland and climatic conditions in Xinghai County, Qinghai Province, based on the meteorological and forage observation data of recent 11 years in Xinghai County, Qinghai Province, a systematic analysis was made on the grass turning green in this area. Characteristics of relationship between growth height and yield and hydrothermal factors. The results showed that there was a 38 day difference between the spring rainy season and the spring drought year, and the early or delayed green stage was mainly related to the first day of 鈮，

本文編號(hào)：2416871