Crops ›› 2022, Vol. 38 ›› Issue (5): 249-254.doi: 10.16035/j.issn.1001-7283.2022.05.036

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Effects of Water Spraying Interval at Seedling Stage on Growth and Yield of Rice

Li Rui(), Dong Liqiang, Shang Wenqi, Yu Guangxing, Dai Guijin, Wang Zheng, Li Yuedong()   

  1. Liaoning Rice Research Institute, Shenyang 110101, Liaoning, China
  • Received:2022-01-10 Revised:2022-04-19 Online:2022-10-15 Published:2022-10-19

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Abstract:

We used Liaojing 401 as the material and two substance treatments (organic substrate and nutrient soil) and three water spray cycles treatments (24, 48 and 72h) to examine the impacts of water management for dry seedbed at seedling stage on growth and yield of rice. The seedling quality, growth and development in field and yield were studied. The results showed that the seedling plant height when the spray interval increased from 24h to 72h, the roots number and ratio of root to shoot increased, and the overall quality of the seedlings was enhanced. Rice seedlings of 72h spraying interval entered tiller stage quickly and gain more tillers, the main growth stages ware advanced. The leaf area index and dry matter accumulation of the rice with 72h spraying interval were high at the stages of jointing, heading and maturity. The productive panicle number and seed-setting rate increased at maturity stage, and the yield was the highest with 72h spraying interval.

Key words: Rice, Water treatment, Seedling quality, Tiller, Leaf area index, Dry matter accumulation, Yield

Table 1

Effects of water spraying interval on the aboveground part traits of rice seedlings"

年份
Year		 处理
Treatment		 叶龄
Leaf age		 SPAD 株高
Plant height (cm)		 茎基宽
Basal stem width (mm)		 百株地上部干质量
Shoot dry weight per 100 plants (g)
2018 S24 3.2±0.0a 27.89±1.74b 14.2±0.3a 2.2±0.0a 2.22±0.13a
S48 3.2±0.1a 30.12±1.54b 13.5±0.1a 2.2±0.0a 1.97±0.09ab
S72 3.1±0.0a 33.95±0.28a 12.4±0.4b 2.2±0.0a 1.79±0.09b
N24 3.1±0.1a 28.45±0.56b 14.6±0.5a 2.2±0.0a 2.21±0.08a
N48 3.2±0.1a 29.33±1.08b 13.5±0.4ab 2.2±0.0a 1.97±0.08b
N72 3.1±0.1a 33.07±1.53a 12.4±0.5b 2.2±0.1a 1.80±0.05b
2019 S24 3.2±0.1a 32.21±0.21b 18.7±0.7a 2.3±0.1a 2.25±0.07a
S48 3.2±0.0a 34.45±0.98ab 17.2±0.6a 2.4±0.1a 2.11±0.02a
S72 3.2±0.1a 35.36±1.17a 14.2±0.8b 2.4±0.0a 1.86±0.07b
N24 3.2±0.0a 30.45±1.09b 19.8±1.0a 2.4±0.1a 2.28±0.10a
N48 3.2±0.1a 33.81±0.72a 17.3±0.6ab 2.4±0.1a 2.09±0.08ab
N72 3.1±0.1a 34.64±0.52a 15.0±1.0b 2.4±0.1a 1.92±0.06b

Table 2

Effects of water spraying interval on roots of rice seedlings"

年份
Year		 处理
Treatment		 根数
Root number		 根长
Root length (cm)		 百株根干质量
Root dry weight per 100 plants (g)		 根冠比
Ratio of root to shoot (%)
2018 S24 9.4±0.6b 8.5±1.0a 0.81±0.03b 36.74±2.25c
S48 9.8±0.4ab 7.8±0.8a 0.91±0.06ab 46.14±1.97b
S72 10.9±0.5a 8.7±0.9a 0.98±0.03a 54.96±0.89a
N24 8.8±0.2b 8.2±0.7a 0.80±0.03b 36.12±2.82c
N48 9.3±0.3ab 8.2±0.6a 0.85±0.03b 43.43±3.09b
N72 10.2±0.4a 8.7±0.4a 0.97±0.01a 54.19±1.78a
2019 S24 9.6±0.3b 9.2±0.4a 0.81±0.04b 35.76±2.95b
S48 10.1±0.4b 8.2±0.6a 0.87±0.03ab 41.36±2.24b
S72 11.1±0.3a 9.3±0.6a 0.96±0.07a 51.70±4.97a
N24 9.1±0.3b 9.5±0.4a 0.80±0.06b 35.13±2.06c
N48 9.4±0.3b 9.5±0.9a 0.88±0.05ab 42.38±2.36b
N72 10.6±0.1a 9.1±0.5a 0.92±0.01a 48.03±0.77a

Fig.1

Dynamics of rice tiller number under water spraying interval"

Table 3

Effects of water spraying interval on main growth stage"

年份
Year		 处理
Treatment		 播种期
Sowing		 移栽期
Transplanting		 始蘖期
Tiller		 拔节期
Jointing		 齐穗期
Heading		 成熟期
Maturity		 全生育期
Growth period (d)
2018 S24 04-15 05-15 05-26 07-06 08-05 09-25 164
S48 04-15 05-15 05-25 07-04 08-03 09-23 162
S72 04-15 05-15 05-24 07-03 08-02 09-23 162
N24 04-15 05-15 05-26 07-06 08-05 09-25 164
N48 04-15 05-15 05-25 07-05 08-04 09-24 163
N72 04-15 05-15 05-24 07-04 08-02 09-23 162
2019 S24 04-15 05-15 05-29 07-08 08-07 09-28 167
S48 04-15 05-15 05-27 07-06 08-06 09-26 165
S72 04-15 05-15 05-27 07-05 08-05 09-25 164
N24 04-15 05-15 05-29 07-08 08-08 09-28 167
N48 04-15 05-15 05-28 07-07 08-07 09-27 166
N72 04-15 05-15 05-27 07-05 08-05 09-25 164

Fig.2

Effects of water spraying interval on LAI of rice Different letters mean significantly different (P < 0.05) between treatments"

Table 4

Effects of water spraying interval on dry matter weight of population"

年份
Year		 处理
Treatment		 地上部干质量Dry weight of aboveground parts (t/hm2) 根干质量Dry weight of root (t/hm2)
拔节期Jointing 齐穗期Heading 成熟期Maturity 拔节期Jointing 齐穗期Heading
2018 S24 6.20±0.06c 10.36±0.36b 18.12±0.13b 1.15±0.04b 1.41±0.02b
S48 6.47±0.04b 10.92±0.14b 18.81±0.34b 1.21±0.02ab 1.44±0.01b
S72 6.83±0.10a 11.68±0.25a 20.36±0.46a 1.28±0.02a 1.49±0.01a
N24 6.17±0.08b 10.42±0.23b 17.83±0.15c 1.11±0.01b 1.37±0.01b
N48 6.39±0.08b 10.78±0.07b 18.67±0.25b 1.16±0.01b 1.43±0.03a
N72 6.67±0.08a 11.32±0.16a 19.66±0.28a 1.23±0.03a 1.47±0.02a
2019 S24 6.70±0.03b 11.15±0.28b 18.46±0.28c 1.17±0.01c 1.46±0.01b
S48 6.83±0.07b 11.92±0.10a 19.71±0.11b 1.24±0.02b 1.51±0.02b
S72 7.08±0.04a 12.49±0.24a 21.15±0.18a 1.29±0.01a 1.60±0.03a
N24 6.65±0.07c 11.07±0.12c 17.69±0.69b 1.16±0.02b 1.43±0.00b
N48 6.88±0.05b 11.70±0.04b 19.31±0.48a 1.21±0.02a 1.48±0.03b
N72 7.09±0.03a 12.47±0.09a 20.67±0.24a 1.25±0.02a 1.58±0.03a

Table 5

Effects of water spraying interval on rice grain yield and its components"

年份
Year		 处理
Treatment		 有效穗数
Productive panicle
number (×104/hm2)		 每穗颖花数
Spikelet number
per panicle		 结实率
Seed-setting
rate (%)		 千粒重
1000-grain
weight (g)		 实际产量
Actual yield
(t/hm2)
2018 S24 380.67±7.37b 136.6±0.5a 85.95±0.36b 22.01±0.10a 9.43±0.21b
S48 393.33±6.54ab 136.9±0.4a 86.82±0.26b 21.95±0.21a 9.72±0.02b
S72 406.67±3.01a 137.2±0.2a 89.08±0.48a 22.11±0.30a 10.29±0.20a
N24 379.33±2.04b 137.1±0.4a 86.11±0.21c 21.99±0.22a 9.46±0.07b
N48 386.67±4.44b 138.1±1.1a 87.20±0.30b 21.97±0.03a 9.60±0.04b
N72 402.67±2.52a 137.9±1.1a 89.12±0.44a 22.08±0.25a 10.24±0.06a
2019 S24 396.67±4.02b 136.4±0.7a 89.25±0.33b 21.99±0.22a 9.96±0.09b
S48 404.67±1.68b 136.8±0.3a 90.29±0.55b 22.13±0.23a 10.39±0.29ab
S72 417.33±5.09a 137.9±0.5a 91.65±0.29a 22.06±0.20a 10.94±0.21a
N24 393.33±1.02c 135.9±0.5b 89.36±0.50b 22.00±0.23a 9.87±0.13b
N48 400.67±1.39b 136.4±0.6ab 89.95±0.53ab 22.11±0.18a 10.26±0.13b
N72 414.67±2.14a 137.6±0.1a 91.36±0.77a 22.06±0.34a 10.81±0.18a
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