青海省兴海县天然草地牧草生长发育与气候条件的关系
发布时间：2019-01-28 08:07
【摘要】：为了解青海省兴海县天然草地牧草生长发育及其与气候条件的关系,本研究基于青海省兴海县近11年的气象和牧草观测数据,较系统地分析了该区牧草返青、生长高度和产量与水热因子的关系特征。结果表明,春季多雨与春季干旱年份牧草返青期相差38d,牧草返青期提前或推迟主要与≥0℃初日的时间、当年3-4月份降水量和上年9-11月份降水量密切相关,牧草返青期降水的最佳气候模型为一次线性回归方程;牧草全生育期植物高度增加量与降水呈显著正相关关系(P0.05),而与气温呈负相关关系;另外,牧草生长高峰期6-7月份降水量每增加10 mm,鲜草增产225kg·hm~(-2)。因此,降水量是限制青海省兴海县天然草地牧草返青和生长发育的主要气象因子。
[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，
本文编号：2416871
[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，
本文编号：2416871
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