基于透水混凝土渗灌不同灌水量对低丘红壤区蜜桔生长的影响

为研究不同灌水量对丘陵红壤区蜜桔生长的影响，对南丰县大田蜜桔进行透水混凝土渗灌试验。在实验地设置3 个不同灌水量水平(H₁低水，H₂中水，H₃高水)的灌溉处理，结果表明：土壤水分垂向分布大致呈先增大后减小的趋势，当透水混凝土灌水器埋深在 30cm 时土壤含水量到达峰值；在整个生育期内 H₂灌水处理枝长增长率最大；同时灌水量越大，果型指数基本呈现减小的趋势；各灌水处理蜜桔糖分随时间的增长而升高，H₃处理组果实糖分最高。综合蜜桔生长规律及枝长增长率、果实横纵径、果型指数、蜜桔糖分等 4 个指标对水分调控的响应，得出对低丘红壤透水混凝土渗灌条件下 H₃为最佳灌水处理。

Effects of irrigation amount on the growth of oranges based on permeable concrete infiltration irrigation in hilly red soil areas

In order to study the effects of different irrigation amounts on the growth of honey oranges in the hilly red soil area, the project conducted a permeable concrete infiltration irrigation experiment on the field oranges in Nanfeng county. In the experimental site, three irrigation treatments with different irrigation levels (H1 low water, H2 medium water, H3 high water) were set up, and the results showed that the vertical distribution of soil moisture showed a tendency to increase first and decrease later, and the soil moisture content reached the peak when the permeable concrete filler was buried at a depth of 30 cm, the water content reached the peak of the water content; the branch growth rate of H2 irrigation levels was the largest during the whole growth period; With the growing amount of irrigation,the fruit type index basically showed a decreasing trend; the honey orange sugar content of each irrigation treatment increased with time, and the fruit sugar content of the H3 treatment group was the highest. Based on the responses of four indicators, including the growth law of honey orange, branch length growth rate, fruit transverse and longitudinal diameter, fruit type index, and honey orange sugar content, the best irrigation treatment was obtained when H3 under the conditions of permeable concrete infiltration of low hilly red soil.