Crops ›› 2018, Vol. 34 ›› Issue (3): 141-147.doi: 10.16035/j.issn.1001-7283.2018.03.022

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Effects of Nitrogen and Soil Type on Seedling Quality and Nutrient Absorption in Rice

Tang Zhiqiang,Dong Liqiang,Li Rui,Zhang Liying,He Na,Li Yuedong   

  1. Liaoning Rice Research Institute, Shenyang 110101, Liaoning, China
  • Received:2018-01-19 Revised:2018-03-13 Online:2018-06-20 Published:2018-06-20

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Abstract:

In order to study the effects of nitrogen fertilizer on rice seedling quality and nutrient absorption characteristics in two types of soils, Liaojing 401 was used as experimental material to study the effects of four nitrogen fertilizer treatments on rice seedling quality and nutrient absorption. The results showed that the accumulation of dry matter in clay soil was significantly higher than that in sandy soil, which was more conducive to the growth of the up-ground part and root system, dry matter accumulation and nutrient absorption. During 20-30 days after sowing, the seedling quality, root morphology and dry matter quality of seedlings cultivated by clayey soil had a rising trend. the growth rule of seedlings cultivated by sandy soil was basically consistent with that of clayey soil. seedlings grew slowly before 25 days, During 25-30 days, the seedlings grew rapidly and the dry matter accumulation was obviously insufficient. The seedling quality, root morphology and dry matter quality were the best under the condition of 4g/plate nitrogen application. The maximum total nitrogen uptake of the seedlings cultured in clay soil was 4.24g/plate, and the maximum total nitrogen uptake of the seedlings cultured in sandy soil was 4.03g/plate. the application of 4g/plate could meet the requirements of the seedlings on nitrogen, and the utilization efficiency of nitrogen could also be improved.

Key words: Rice, Nitrogen, Soil type, Seedling quality, Nutrient absorption

Table 1

Effects of nitrogen and soil type on seedling quality and root system (15d)"

处理
Treatment		 地上部分Up-ground part 地下部分Under-ground part
株高(cm)
Plant height		 叶龄
Leaf age		 茎基宽(mm)
Stem width		 根长(cm)
Root length		 根表面积(cm2)
Root surface area		 根体积(cm3)
Root volume		 根直径(mm)
Root diameter		 根尖数
Root tips
黏质土Clay N1 7.59b 1.91a 1.40c 83.72b 17.41b 0.26b 0.19b 240.06c
N2 10.65a 1.92a 1.64a 94.00a 18.31a 0.28a 0.21a 270.00b
N3 10.32a 1.95a 1.57b 96.77a 18.14a 0.27ab 0.21a 272.45b
N4 10.48a 1.92a 1.57b 94.87a 18.18a 0.27ab 0.21a 307.39a
砂质土Sandy N1 7.81c 1.91a 1.53c 83.92b 16.69a 0.23c 0.21b 204.93c
N2 10.03b 1.93a 1.80a 87.52a 17.25a 0.29a 0.22ab 227.03b
N3 10.92a 1.94a 1.76ab 88.09a 17.13a 0.27b 0.21b 238.71a
N4 9.93b 1.93a 1.71b 84.75ab 17.32a 0.28ab 0.23a 236.86ab

Table 2

Effects of nitrogen and soil type on seedling quality and root system (20d)"

处理
Treatment		 地上部分Up-ground part 地下部分Under-ground part
株高(cm)
Plant height		 叶龄
Leaf age		 茎基宽(mm)
Stem width		 根长(cm)
Root length		 根表面积(cm2)
Root surface area		 根体积(cm3)
Root volume		 根直径(mm)
Root diameter		 根尖数
Root tips
黏质土Clay N1 9.33c 2.34c 1.59b 87.74c 17.41b 0.22d 0.19b 275.17c
N2 12.17b 2.54b 1.76a 104.96a 18.31a 0.29b 0.20a 307.76b
N3 12.51b 2.92a 1.77a 107.01a 18.14a 0.32a 0.20a 303.54b
N4 13.29a 2.84a 1.82a 100.02b 18.18a 0.27c 0.20a 334.31a
砂质土Sandy N1 11.47c 2.25c 1.78b 88.35b 17.07b 0.25b 0.19c 238.92b
N2 12.65b 2.59b 1.89a 96.45a 17.96a 0.24b 0.19c 274.61a
N3 13.26a 2.57b 1.88a 98.53a 18.54a 0.29a 0.21b 281.17a
N4 13.81a 2.82a 1.92a 95.92a 18.59a 0.28a 0.22a 273.20a

Table 3

Effects of nitrogen and soil type on seedling quality and root system (25d)"

处理
Treatment		 地上部分Up-ground part 地下部分Under-ground part
株高(cm)
Plant height		 叶龄
Leaf age		 茎基宽(mm)
Stem width		 根长(cm)
Root length		 根表面积(cm2)
Root surface area		 根体积(cm3)
Root volume		 根直径(mm)
Root diameter		 根尖数
Root tips
黏质土Clay N1 10.70d 2.53c 1.82d 98.19c 17.60b 0.26a 0.19a 302.75c
N2 14.05c 2.90b 2.07c 115.98a 18.62a 0.23b 0.18b 342.51b
N3 14.73b 3.09a 2.16b 116.07a 19.03a 0.21c 0.17c 364.38a
N4 15.64a 3.15a 2.25a 107.02b 18.99a 0.23b 0.18b 361.71a
砂质土Sandy N1 13.69b 2.91b 1.89b 91.55c 17.51b 0.26a 0.18a 262.77c
N2 14.94a 3.07a 1.95ab 105.45b 18.35ab 0.24b 0.18a 304.25b
N3 14.72a 3.03ab 2.04a 109.86b 18.97a 0.19c 0.17b 324.30a
N4 15.04a 3.03ab 2.02a 116.74a 18.92a 0.25ab 0.17b 338.74a

Table 4

Effects of nitrogen and soil type on seedling quality and root system (30d)"

处理
Treatment		 地上部分Up-ground part 地下部分Under-ground part
株高(cm)
Plant height		 叶龄
Leaf age		 茎基宽(mm)
Stem width		 根长(cm)
Root length		 根表面积(cm2)
Root surface area		 根体积(cm3)
Root volume		 根直径(mm)
Root diameter		 根尖数
Root tips
黏质土Clay N1 13.73c 3.25b 2.09c 99.37c 17.41b 0.18d 0.16b 308.43d
N2 15.29b 3.25b 2.20b 125.15b 18.31a 0.29a 0.19a 340.34c
N3 15.78b 3.38ab 2.28ab 131.99a 18.14a 0.24b 0.16b 384.44b
N4 16.81a 3.49a 2.36a 121.73b 18.18a 0.19c 0.16b 414.31a
砂质土Sandy N1 14.03c 2.92b 1.99b 96.20c 17.16c 0.25a 0.18a 285.50c
N2 16.63b 3.38a 2.08ab 119.01b 20.13a 0.25a 0.17b 362.27b
N3 17.16ab 3.30a 2.14a 124.85a 19.14b 0.21c 0.17b 378.80b
N4 17.51a 3.27a 2.14a 125.22a 19.83ab 0.23b 0.17b 399.27a

Fig.1

Effects of nitrogen and soil type on rice root/shoot"

Table 5

The absorption process of nutrient elements in the underground parts under different soils type"

处理
Treatment		 根系Root 茎叶Stem and leaf 氮积累总量
(mg/100株)
Total N accumulation
（mg/100 plants）		 氮总吸收量
(g/盘)
Total N uptake
(g/tray)
氮含量
(%)
N content		 氮积累量(mg/100株)
N accumulation
（mg/100 plants）		 氮含量
(%)
N content		 氮积累量(mg/100株)
N accumulation
（mg/100 plants）
黏质土Clay N1 1.41d 14.43d 2.14d 47.02c 61.44d 1.84d
N2 1.62c 18.81c 2.88c 70.29b 89.08c 2.67c
N3 2.41a 34.27a 3.67b 106.93a 141.20a 4.24a
N4 1.97b 20.69b 3.85a 109.71a 130.41b 3.91b
砂质土Sandy N1 1.17c 8.51c 2.13c 44.98c 53.48c 1.60c
N2 1.55b 12.37b 3.55b 90.05b 102.43b 3.07b
N3 1.85a 15.90a 4.22a 115.74a 131.64a 3.95a
N4 1.83a 15.90a 4.15a 118.50a 134.40a 4.03a
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