Study on Soil Moisture Characteristics in Southern China Karst Plant Community Structure Types

An understanding of soil moisture variation patterns under different plant community structures is crucial for the restoration vegetation in southern China karst regions. Therefore, four structure types: arbor + herb (AH), shrub (SH), (ASH), and (H), were selected as research objects. A sensor was used to monitor content 0–70 cm layer, analyze characteristics explore differences types. The results indicate that: (1) total 31 species genera 18 families recorded, among which herbs most abundant. There significant diversity indexes ASH H. between Shannon–Wiener index Simpson AH H significant, SH Pielou statistically significant. significantly different. (2) water types, showing > ASH. consistent with trend rainfall, surface more sensitive rainfall events, deeper had a lag. positively correlated Margalef index. highly positive correlation 20–30 layer negatively (3) response types light rain event not obvious. growth rates 30–50 50–70 layers higher moderate than that heavy event, H, AH, larger events. provide reference effective utilization resources vegetation, well configuration decisions region.