Growth characteristics of Haloxylon ammodendron seedlings under soil moisture change in habitat

doi:10.14088/j.cnki.issn0439-8114.2024.09.008

Abstract

Abstract: Different water gradients were set up to analyze the changes of soil moisture content in different soil layers of the root zone and the growth of Haloxylon ammodendron seedlings, and to explore the responses characteristics of Haloxylon ammodendron seedlings at different stages and under different drought stresses. The results showed that the moisture content in 0~20 cm soil layer was less than that in 20~40 cm soil layer in the root zone of Haloxylon ammodendron seedlings, and the skewness coefficient and kurtosis coefficient of soil moisture content at each stage in 0~20 cm soil layer were higher than those in 20~40 cm soil layer. The change of water content in each soil layer during the growth period of Haloxylon ammodendron seedlings （June, August and October） conformed to normal distribution at the inspection level of 0.05. Under different drought stresses, the increase in various morphological indicators （plant height, crown area, basal diameter） of Haloxylon ammodendron seedlings showed a decreasing trend with time. From June to August, the increase of plant height of Haloxylon ammodendron seedlings showed mild drought treatment>moderate drought treatment>severe drought treatment>CK, the increase of crown area showed mild drought treatment>CK>moderate drought treatment>severe drought treatment, the increase of basal diameter showed CK>mild drought treatment>moderate drought treatment>severe drought treatment. From August to October, the increase of plant height, crown area, and basal diameter of Haloxylon ammodendron seedlings all showed CK>mild drought treatment>moderate drought treatment>severe drought treatment. During the growth period, the soil moisture content of different soil depths of Haloxylon ammodendron seedlings habitat was negatively correlation with the plant height, crown width and basal diameter, with correlation coefficients of -0.088, -0.506 and -0.711, respectively, and the correlation with basal diameter was significant （P<0.05）.

Key words: Haloxylon ammodendron（C.A.Mey.）Bunge seedlings, growth, habitat, soil moisture

CLC Number:

S727.23

WANG Xiao-man, WANG Ze, REN Cai, ZHENG Han-han, SHI Ya-xin, WU Ming-zhe, TANG Ling, LI Shu-qi. Growth characteristics of Haloxylon ammodendron seedlings under soil moisture change in habitat[J]. HUBEI AGRICULTURAL SCIENCES, 2024, 63(9): 42-46.

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