半干旱地区草地早熟禾草坪蒸散机理和节水机制的研究

发布时间：2018-04-22 10:36

本文选题：草地早熟禾 + 修剪高度　；参考：《内蒙古农业大学》2017年硕士论文

【摘要】：本文对半干旱地区草地早熟禾草坪生长季期间的土壤水分运行规律及其蒸散特性进行了研究,同时也研究了其草坪维持景观的需水特征和节水机制,为半干旱地区草坪制定节水灌溉制度提供理论依据。研究结果表明:(1)草坪草能有效控制草坪浅层土壤水分的蒸散,草地早熟禾草坪的蒸散与草坪草根系的根量及分布显著相关,降雨及草坪地上Ocm处的湿度能显著影响草地早熟禾草坪的蒸散量。(2)草地早熟禾草坪的蒸散量随着修剪高度的增加而增加,在生长季期间有两个蒸散量的高峰,分别为5月和7月。(3)在半干旱呼和浩特地区的生长季期间,修剪高度为3cm、5cm、8cm、12cm和不修剪的草地早熟禾草坪应分别在其0～30cm 土层的土壤含水量达到15.05%、14.40%、13.98%、13.73%和13.57%时进行灌溉。随着修剪高度的增加草地早熟禾草坪灌溉次数及灌溉量都有所增加。相较与传统的灌溉水平,各修剪高度草坪灌溉量都有所减少。
[Abstract]:In this paper, the characteristics of soil moisture and evapotranspiration during the growing season of Kentucky bluegrass in semi-arid area were studied, and the characteristics of water demand and water-saving mechanism of turf maintenance landscape were also studied. It provides theoretical basis for the establishment of water-saving irrigation system for lawn in semi-arid area. The results showed that turfgrass could effectively control the evapotranspiration of soil water in the shallow layer of turf, and the evapotranspiration of Kentucky bluegrass lawn was significantly related to the root quantity and distribution of grass root line. The evapotranspiration of Kentucky bluegrass lawn increased with the increase of pruning height, and there were two peaks of evapotranspiration during the growing season. During the growing season in the semi-arid Hohhot area, the pruning height was 3 cm ~ (5) cm ~ (-1) ~ (8) cm ~ (-1) ~ (12) cm and the unmowed grass lawn should be irrigated when the soil water content in the 0~30cm soil layer reached 15.05 ~ 14.40% 13.98% and 13.57%, respectively. With the increase of pruning height, the irrigation times and irrigation amount of Kentucky bluegrass increased. Compared with the traditional irrigation level, the irrigated amount of lawn at all pruning heights was reduced.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S688.4

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