Crops ›› 2023, Vol. 39 ›› Issue (6): 174-180.doi: 10.16035/j.issn.1001-7283.2023.06.024

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Effects of Water and Nitrogen Interaction on Physiological Characteristics and Growth of Peanut during the Pod-Pin Stage

Xiu Junjie(), Liu Xueliang()   

  1. Tieling Academy of Agricultural Sciences, Tieling 112000, Liaoning, China
  • Received:2022-06-27 Revised:2022-07-15 Online:2023-12-15 Published:2023-12-15

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Abstract:

To clarify the effects of water and nitrogen interaction on physiological characteristics and growth of peanut during the pod-pin stage, the changes of traits of peanut plants, endogenous protective enzyme activity, soluble protein, MDA, root activity and dry matter weight in peanut leaves were examined with soil water stress. The experiment was conducted by a normal irrigation with a short drought treatment under the rainproof shelter of Tieling peanut demonstration base and each treatment was imposed by three nitrogen levels: 0, 90, 180kg N/ha (N0, N1, N2). The results showed that, compered with control, the character indexes of peanut, the activity of CAT, solube protein content, root activity, and dry matter weight were reduced; SOD and POD activity, MDA and proline content, the root/shoot ratio (R/S) were increased. The drought resistant of peanut with N1 treatment had a good performance, and the N0 and N2 had a opposite performance. Ten days after rehydration, the endogenous protective enzyme activities, soluble protein, MDA and proline contents recovered rapidly, but root activity and dry matter weight were showed still lower than normal water treatment levels. In addition, N application could promote the traits of peanut plants, such as endogenous protective enzyme activities, soluble protein and proline content, root ability, dry matter weight, R/S, and reduced water stress index. To sum up, N1 treatment was the most suitable N application for the drought stress, and the antioxidant ability of peanut can be improved by optimal application of nitrogen fertilizer, and then enhance the drought resistance.

Key words: Peanut, Pod-pin stage, Water and nitrogen interaction, Physiological characteristics

Table 1

Effects of nitrogen fertilizer on the soil relative water content under water-stress of peanut during pod-pin stage %"

水分处理
Water treatment		 T1 T2
N0 N1 N2 N0 N1 N2
干旱处理
Drought-stress		 32.75c 25.19c 19.31c 77.15c 78.13c 76.83c
正常灌水
Well-watering		 75.95a 72.87a 72.12a 75.04a 74.78a 74.01a

Table 2

Effects of irrigation and nitrogen fertilizer on peanut characteristics at pod-pin stage"

水分处理
Water
treatment		 氮素水平
Nitrogen
level		 T1 T2
根长
Root length
(cm)		 主茎高
Main stem
height (cm)		 侧枝长
Branch
length (cm)		 分枝数
Branch
number		 主茎叶数
Main stem
leaves		 根长
Root length
(cm)		 主茎高
Main stem
height (cm)		 侧枝长
Branch
length (cm)		 分枝数
Branch
number		 主茎叶数
Main stem
leaves
干旱处理
Drought-stress		 N0 27.5f 16.4e 18.1f 5.9d 12.9e 31.1e 18.2f 20.4e 6.3e 13.5e
N1 30.9d 21.2c 23.8d 7.3c 13.8d 35.5c 24.9d 26.8c 8.2c 14.9d
N2 34.7b 25.5b 29.1b 8.2b 15.2b 40.1a 30.5b 32.4b 9.4b 16.4b
正常灌水
Well-watering		 N0 28.6e 19.1d 20.9e 6.2d 13.1e 30.7e 20.8e 23.7d 6.8d 14.1e
N1 32.3c 25.3b 28.2c 8.2b 14.5c 34.2d 29.2c 31.8b 9.3b 15.7c
N2 36.8a 30.8a 35.4a 9.5a 16.1a 38.4b 36.3a 38.7a 10.8a 17.8a

Fig.1

Effects of irrigation and nitrogen fertilizer on the activities of SOD at the pod-pin stage Different lowercase letters means significant difference at the 5% level, the same below"

Fig.2

Effects of irrigation and nitrogen fertilizer on the activities of POD at the pod-pin stage"

Fig.3

Effects of irrigation and nitrogen fertilizer on the activities of CAT at the pod-pin stage"

Fig.4

Effects of irrigation and nitrogen fertilizer on soluble protein contents at the pod-pin stage"

Fig.5

Effects of irrigation and nitrogen fertilizer on the content of MDA at the pod-pin stage"

Fig.6

Effects of irrigation and nitrogen fertilizer on Pro contents at the pod-pin stage"

Fig.7

Effects of irrigation and nitrogen fertilizer on root vigor at the pod-pin stage"

Table 3

Effects of irrigation and nitrogen fertilizer on dry matter accumulation in peanut at the pod-pin stage"

水分处理
Water
treatment		 氮素水平
Nitrogen
level		 T1 T2
干物质积累量
Dry matter accumulation (g)		 根冠比
Root/shoot		 水分胁迫指数
Water stress index		 干物质积累量
Dry matter accumulation (g)		 根冠比
Root/shoot		 水分胁迫指数
Water stress index
干旱处理
Drought-stress
 N0 192.2b 0.085a 0.071c 327.1c 0.075b 0.092a
N1 255.1a 0.077b 0.109b 416.8b 0.076b 0.075b
N2 269.3a 0.078b 0.143a 475.3a 0.078a 0.053c
正常灌水
Well-watering		 N0 206.8c 0.084a 360.3c 0.062d
N1 286.3b 0.076b 450.8b 0.063d
N2 314.2a 0.077b 502.1a 0.065c
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