Effects of Soil Moisture on the Growth and Evapotranspiration of Amygdalus pedunculata

doi:10.11924/j.issn.1000-6850.casb19030130

Abstract

Abstract:

Using Amygdalus pedunculata 1-year-old seedlings, we studied the growth and evapotranspiration characteristics of A. pedunculata under water stress with three soil water content levels: CK (optimal soil water content, 75%-100% of the field capacity), mild drought stress (50%-75% of the field capacity) and waterlogging stress (100%-125% of the field capacity). The results showed that evapotranspiration decreased with the increase of drought stress and drought stress had a significant effect on the growth and evapotranspiration of A. pedunculata. The plant height, branch diameter, leaf area and number of new branches of A. pedunculata increased under mild drought stress, but the leaf senescence was also fast. Waterlogging stress was conducive to the growth of leaf area and branch diameter and could slow down the leaf senescence, but it was not good for the increase of plant height and number of new branches. The comprehensive analysis showed that mild drought stress was the most suitable soil moisture content for the growth of A. pedunculata seedlings.

Key words: soil water, Amygdalus pedunculata, growth characteristics, evapotranspiration

CLC Number:

S152.7

Zhao Xin, Zhu Chao, Zhai Sheng, Tian Xiaofei, Zhang Qingxin, Xin Yifan, Sun Shuchen. Effects of Soil Moisture on the Growth and Evapotranspiration of Amygdalus pedunculata[J]. Chinese Agricultural Science Bulletin, 2020, 36(13): 48-52.

Figures/Tables 5

References 25

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田间持水量	株高/cm	基径/mm	新枝数
50%~75%	24.17±5.20a	1.40±0.40a	6.33±3.51a
75%~100%	14.80±1.99b	1.05±0.82a	2.33±1.53a
100%~125%	12.33±1.33b	1.32±0.50a	1.33±0.58a

田间持水量	株高/cm	基径/mm	新枝数
50%~75%	24.17±5.20a	1.40±0.40a	6.33±3.51a
75%~100%	14.80±1.99b	1.05±0.82a	2.33±1.53a
100%~125%	12.33±1.33b	1.32±0.50a	1.33±0.58a