Crops ›› 2024, Vol. 40 ›› Issue (4): 113-120.doi: 10.16035/j.issn.1001-7283.2024.04.014

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Effects of Different Base Application Amounts of Calcium- Magnesium Hydrotalcite in Early Rice on Yield and Rice Quality of Double-Cropping Rice in Southern Hunan

Yuan Shuai1(), He Mingjuan1(), Cui Can1, Han Yu1, Yu Peng2, Yi Zhenxie1()   

  1. 1College of Agronomy, Hunan Agricultural University, Changsha 410128, Hunan, China
    2College of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, Hunan, China
  • Received:2023-07-13 Revised:2023-09-04 Online:2024-08-15 Published:2024-08-14

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Abstract:

In order to study the effect of calcium-magnesium hydrotalcite on the yield and quality of double- cropping rice, and explore the optimal application rate of calcium-magnesium hydrotalcite in the double- cropping rice area in southern Hunan, using early rice cultivars “Luliangyou 996” (high Cd accumulation cultivar) and “Zhuliangyou 819” (low Cd accumulation cultivar), late rice cultivars “Yuzhenxiang” (high Cd accumulation cultivar) and “Xiangwanxian 13” (low Cd accumulation cultivar) as materials, a field experiment was carried out in Hengyang county, Hunan province. Comparative study of rice yield, yield formation characteristics and rice quality under different dosages of calcium-magnesium hydrotalcite (0, T1; early rice base application 1500 kg/ha, T2; early rice base application 2250 kg/ha, T3; early rice base application 3000 kg/ha, T4). The results showed that, different dosages of calcium-magnesium hydrotalcite could increase rice tiller number, significantly increased rice leaf area index, relative chlorophyll content (SPAD value) and dry matter accumulation, among which the effects of T3 and T4 treatments were better. Calcium-magnesium hydrotalcite significantly increased the yield of rice, and the yields of all varieties were higher under T3 and T4 treatments. Calcium-magnesium hydrotalcite had no significant effect on rice processing, appearance and cooking quality, but it could significantly reduce the cadmium content of brown rice, and the T4 and T3 treatments had a higher reduction rate. Considering the significant difference in rice yield and rice quality among different application rates and the economy, it was more appropriate to apply calcium-magnesium hydrotalcite 2250 kg/ha in the double-cropping rice fields in southern Hunan.

Key words: Rice, Calcium-magnesium hydrotalcite, Southern Hunan, Yield, Rice quality

Table 1

Effects of calcium-magnesium hydrotalcite application rate on rice yield and its components"

季别
Season		 品种
Variety		 处理
Treatment		 有效穗数
Effective number of
panicles (×104/hm2)		 穗粒数
Grains per
panicle		 结实率
Seed-setting
rate (%)		 千粒重
1000-grain
weight (g)		 理论产量
Theoretical
yield (t/hm2)		 实际产量
Actual yield
(t/hm2)
早稻Early rice 陆两优996 T1 220.14c 135.14a 73.14c 28.33a 6.18c 5.47b
T2 221.15c 135.20a 73.45c 28.24a 6.22c 5.54b
T3 231.04b 128.56b 80.21b 28.28a 6.83b 6.24a
T4 237.15a 126.58b 83.54a 28.22a 7.17a 6.56a
株两优819 T1 225.10d 150.12a 78.26c 25.96b 6.93c 6.61c
T2 240.02c 142.36b 81.40b 26.02b 7.26b 6.90b
T3 248.00b 141.12b 84.51a 25.53a 7.59a 7.26a
T4 259.12a 137.14c 84.32a 25.41a 7.66a 7.31a
晚稻Late rice 玉针香 T1 248.36c 127.15a 78.86b 28.76a 7.18c 7.06c
T2 268.58b 119.85b 82.63ab 28.64a 7.66b 7.46b
T3 270.15b 119.61bc 82.32ab 28.62a 7.69b 7.63b
T4 296.21a 115.75c 84.21a 28.51a 8.40a 8.19a
湘晚籼13号 T1 219.45c 155.26a 77.44a 27.85a 7.42c 7.25c
T2 231.65b 150.32b 81.25b 27.62a 7.89b 7.75b
T3 256.45a 147.12bc 81.49b 27.75a 8.71a 8.48a
T4 258.92a 145.14c 83.57b 27.59a 8.85a 8.62a

Fig.1

Tiller dynamics of early rice varieties PT: Peak tillering stage, BT: Booting stage, FH: Full heading stage, MF: Mid-filling stage. The same below."

Fig.2

Tiller dynamics of late rice varieties"

Table 2

Effects of calcium-magnesium hydrotalcite rate on LAI of rice"

季别
Season		 品种
Variety		 处理
Treatment		 分蘖盛期
Peak tillering stage		 孕穗期
Booting stage		 齐穗期
Full heading stage		 灌浆中期
Mid-filling stage
早稻
Early rice		 陆两优996 T1 2.75b 3.41b 3.35b 3.25b
T2 2.84b 3.55b 3.41b 3.31b
T3 2.95ab 4.15a 3.94a 3.61a
T4 3.20a 4.31a 4.07a 3.81a
株两优819 T1 2.36b 3.61b 3.32c 2.69c
T2 2.48b 3.76b 3.54b 2.91b
T3 2.80a 3.97a 3.73a 3.37a
T4 2.84a 4.11a 3.82a 3.42a
晚稻
Late rice		 玉针香 T1 4.15b 4.93c 4.65b 4.19c
T2 4.41ab 5.71b 5.32a 4.75b
T3 4.45ab 5.71b 5.34a 4.81ab
T4 4.77a 6.25a 5.73a 5.26a
湘晚籼13号 T1 4.84b 6.71c 5.47c 5.24b
T2 5.08ab 7.46b 5.98b 5.65b
T3 5.35a 7.91a 6.65a 6.24a
T4 5.43a 7.87a 6.69a 6.31a

Table 3

Effects of calcium-magnesium hydrotalcite application rate on SPAD value of rice leaves"

季别Season 品种Variety 处理Treatment 分蘖盛期Peak tillering stage 孕穗期Booting stage 齐穗期Full heading stage 灌浆中期Mid-filling stage
早稻
Early rice		 陆两优996 T1 31.97c 38.45b 39.20b 37.22b
T2 32.04c 38.46b 40.22ab 39.11b
T3 34.91b 41.35a 41.60a 40.52a
T4 36.21a 41.37a 42.53a 41.30a
株两优819 T1 35.55c 38.37c 39.11c 38.20b
T2 37.86b 40.83b 42.22b 40.62b
T3 40.22a 42.73a 44.36a 42.20a
T4 40.31a 42.83a 44.43a 42.45a
晚稻
Late rice		 玉针香 T1 33.53c 35.75b 37.11b 34.23b
T2 35.30b 36.81b 37.82b 35.12b
T3 37.79a 38.90a 38.73a 37.24a
T4 38.40a 39.32a 39.35a 38.20a
湘晚籼13号 T1 31.17b 35.12a 35.54c 32.01c
T2 31.33b 35.50a 36.95b 34.77b
T3 32.67a 36.12a 38.69a 36.82a
T4 33.50a 36.51a 38.75a 36.84a

Table 4

Effects of calcium-magnesium hydrotalcite rate on dry matter accumulation of rice t/hm2"

季别
Season		 品种
Variety		 处理
Treatment		 分蘖盛期
Peak tillering stage		 孕穗期
Booting stage		 齐穗期
Full heading stage		 灌浆中期
Mid-filling stage		 成熟期
Maturity stage
早稻
Early rice		 陆两优996 T1 1.76b 3.77b 6.15b 10.55b 10.95b
T2 2.00a 3.85b 6.21b 10.61b 11.00b
T3 2.03a 4.40a 6.83a 11.86a 12.46a
T4 2.26a 4.64a 7.15a 12.57a 13.14a
株两优819 T1 2.02b 3.87b 7.46b 9.28b 13.24c
T2 2.12b 4.04b 7.84b 9.46b 13.81b
T3 2.52a 5.21a 8.12a 10.18a 14.51a
T4 2.43a 5.30a 8.18a 10.51a 14.58a
晚稻
Late rice		 玉针香 T1 3.48b 7.27b 9.74b 11.73b 14.12c
T2 3.71ab 7.56a 10.19a 12.79a 14.78b
T3 3.96a 7.61a 10.22a 12.85a 15.86a
T4 4.08a 7.87a 10.43a 13.16a 16.37a
湘晚籼13号 T1 4.19b 8.99c 10.82c 12.57b 14.52c
T2 4.45b 9.12b 12.16b 13.05b 15.54b
T3 4.77a 9.61a 12.83a 14.39a 16.96a
T4 4.79a 9.67a 12.94a 14.51a 17.02a

Table 5

Effects of calcium-magnesium hydrotalcite application rate on processing and cooking quality of rice"

季别
Season		 品种
Variety		 处理
Treatment		 出糙率
Brown rice rate (%)		 精米率
Milled rice rate (%)		 整精米率
Head rice rate (%)		 直链淀粉含量
Amylose content (%)		 胶稠度
Gel consistency (mm)
早稻
Early rice		 陆两优996 T1 72.67b 64.31a 44.08a 24.36a 54.50a
T2 75.02a 66.00a 44.27a 24.30a 54.40a
T3 75.04a 65.33a 44.83a 24.28a 55.51a
T4 74.67a 66.02a 45.57a 24.26a 55.23a
株两优819 T1 72.33b 65.67a 58.02a 22.71a 53.15a
T2 74.15a 64.05a 58.26a 22.58a 53.61a
T3 74.06a 66.33a 58.18a 25.31a 53.15a
T4 74.67a 65.00a 59.45a 25.34a 54.04a
晚稻
Late rice		 玉针香 T1 77.67a 64.67a 54.46a 17.45a 72.20a
T2 77.71a 64.72a 55.14a 17.49a 74.10a
T3 78.01a 65.67a 55.36a 18.30a 75.30a
T4 78.67a 65.33a 55.35a 18.51a 75.70a
湘晚籼13号 T1 77.92a 66.93a 68.03a 15.65a 53.02a
T2 77.95a 65.28a 72.27a 15.47a 54.15a
T3 76.34a 64.24a 69.88a 15.55a 54.40a
T4 78.21a 65.58a 70.64a 15.34a 53.31a

Table 6

Effects of calcium-magnesium hydrotalcite application rate on appearance and Cd content of rice"

季别
Season		 品种
Variety		 处理
Treatment		 垩白粒率
Chalky grain
rate (%)		 垩白度
Chalkiness
(%)		 粒长
Grain length
(mm)		 粒宽
Grain width
(mm)		 长宽比
Length-width
ratio		 糙米镉含量
Cadmium content
in brown rice (mg/kg)
早稻
Early rice		 陆两优996 T1 36.32a 4.98a 6.23b 2.33a 2.67a 0.14a
T2 36.28a 4.95a 6.24b 2.34a 2.67a 0.10b
T3 35.90a 4.97a 6.32a 2.36a 2.67a 0.06c
T4 35.74a 473a 6.36a 2.32a 2.74a 0.06c
株两优819 T1 16.12a 3.06a 5.97a 2.19a 2.77a 0.11a
T2 15.51a 3.02a 5.29a 2.19a 2.44a 0.09b
T3 15.45a 2.94a 6.01a 2.20a 2.76a 0.07c
T4 15.25a 2.92a 5.56a 2.21a 2.57a 0.07c
晚稻
Late rice		 玉针香 T1 7.68a 3.42a 5.14a 1.84a 2.86a 0.12a
T2 7.42a 2.77a 5.23a 1.86a 2.87a 0.08b
T3 7.26a 2.51a 5.24a 1.89a 2.82a 0.07bc
T4 6.37a 2.02a 5.27a 1.87a 2.87a 0.05c
湘晚籼13号 T1 10.63a 3.06a 6.61b 2.02a 3.32a 0.11a
T2 10.09a 2.93a 6.64b 2.01a 3.34a 0.07b
T3 9.46a 2.63a 6.74b 2.01a 3.39a 0.05c
T4 9.69a 2.61a 6.70a 2.05a 3.32a 0.03c
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