新疆野苹果幼苗生长及生物量分配对降水量和降水间隔时间的响应

doi:10.13866/j.azr.2023.01.11

Abstract

Abstract:

This study aimed to reveal the effects of different precipitation amount and precipitation interval on the growth of Malus sieversii seedlings. A two-factor control experiment was set up based on the average annual precipitation amount and precipitation interval in the experimental site. The three variations of precipitation amount were as follows: W (precipitation amount), W- (15% decrease of precipitation amount), and W+ (15% increase of precipitation amount). The two precipitation intervals were as follows: T (precipitation interval of 4 days) and T+ (precipitation interval of 8 days). Results showed that (1) under the same precipitation interval treatment, seedling basal diameter, leaf number, and above-and under-ground biomass increased with the increase in precipitation amount; (2) under the same precipitation amount treatment, T+ treatment can promote the elongation of the main roots and increase the root/shoot ratio; and (3) compared with W treatment, the relative growth rates of above-ground, under-ground, and total biomass under W+ treatment increased by 55.42%, 20.75%, and 34.43%, respectively. Prolonging the interval of precipitation will promote root growth and under-ground biomass accumulation of M. sieversii seedlings. Within a certain range of precipitation, the increase in precipitation amount can promote the growth and biomass accumulation of M. sieversii.

Key words: Malus sieversii, precipitation amount, precipitation interval, seedling growth

ZHANG Zongfang, XU Jiang, SHI Xiaojun. Responses of seedling growth and biomass allocation of Malus sieversii to precipitation amount and precipitation interval[J].Arid Zone Research, 2023, 40(1): 102-110.

Figures/Tables 6

Fig. 1

Tab. 1

Tab. 2

Tab. 3

Fig. 2

Fig. 3

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处理时间	月平均降水量/mm	降水间隔时间	平均降水量/mm
处理时间	月平均降水量/mm	降水间隔时间	W-	W	W+
6月	84.80	T	9.01	10.60	12.19
6月	84.80	T+	18.02	21.20	24.38
7月	53.20	T	5.65	6.65	7.65
7月	53.20	T+	11.31	13.30	15.30
8月	49.07	T	5.21	6.13	7.05
8月	49.07	T+	10.43	12.27	14.11
9月	37.13	T	3.94	4.64	5.34
9月	37.13	T+	7.89	9.28	10.67

处理	株高/mm	基径/mm	主根长/mm	叶片数/个
W-T	90.95±6.20ab	2.24±0.10b	182.54±21.61ab	9.00±1.00b
WT	91.54±12.44ab	3.11±0.36ab	163.17±30.75b	12.33±0.88b
W+T	110.20±8.68a	3.38±0.35ab	242.86±32.10ab	13.00±1.15b
W-T+	78.89±2.26b	2.77±0.26ab	205.63±9.85ab	10.33±1.86b
WT+	76.35±3.49b	3.09±0.18ab	274.37±54.93a	10.67±0.67b
W+T+	86.21±3.83b	3.47±0.14a	230.73±19.84ab	20.00±3.21a

变异来源	地上生物量	地下生物量	根冠比	相对生长速率
W	16.859^**	7.871^**	1.008	15.510^***
T	2.592	0.05	3.328	0.436
W×T	0.342	1.139	0.456	1.045

Responses of seedling growth and biomass allocation of Malus sieversii to precipitation amount and precipitation interval

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