Crops ›› 2024, Vol. 40 ›› Issue (1): 229-232.doi: 10.16035/j.issn.1001-7283.2024.01.030

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Study on Seedling Quality and Yield of Machine Transplanting Early Rice with the Seedling Raising of Overlayed-Tray Emergence

Shao Meihong1(), Zhu Defeng2(), Cheng Siming1, Cheng Chu1, Xu Qunying1, Hu Chaoshui3   

  1. 1Jiande Extension Center of Agricultural Technology, Jiande 311600, Zhejiang, China
    2China National Rice Research Institute, Hangzhou 310006, Zhejiang, China
    3Longyou County Agricultural Machinery Management Station, Longyou 324400, Zhejiang, China
  • Received:2023-09-24 Revised:2023-12-05 Online:2024-02-15 Published:2024-02-20
  • Contact: Zhu Defeng E-mail:hzjdsmh@163.com;cnrice@qq.com

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Abstract:

Focusing on the problems of irregular seedling emergence, low rate of seedling growth and weak seedling, the differences of the seedling quality and yield of early rice seedling of overlayed-tray emergence by machine transplanting (T) and traditional seedling rearing (NT) were compared. The results showed that compared with NT treatment, the emergence of T treatment was 4-6 days earlier, and the emergence rate was increased by 22.8%. The seedling establishment rate of T treatment was 75.0%, which was 13.3 percent higher than that of NT treatment (61.7%). Compared with NT treatment, T treatment reduced plant height by 1.4 cm, leaf age and green leaf number increased by 0.26 and 0.27, respectively. Plant height, leaf age and number of green leaf uniformity were increased by 7.9, 9.2 and 3.3 percent, respectively. The yield was increased by 10.7%, mainly due to the increase of effective panicle number and grain number per panicle.

Key words: Early rice, Machine transplanting, Overlayed-tray emergence, Seedling raising, Seedling establishment rate, Yield

Fig.1

Effects of different seedling rearing treatments on the emergence rate of early rice"

Fig.2

Effects of different seedling rearing treatments on the seedling establishment rate of early rice Different letters indicate significant difference at 0.05 level."

Table 1

Effects of different seedling rearing treatments on seedling quality of early rice"

性状
Characteristic		 处理Treatment 差异
Difference
NT T
株高Plant height (cm) 14.7 13.2 -1.5**
叶龄Leaf age 3.1 3.3 0.2**
绿叶数Number of green leaves 2.7 3.0 0.3**

Table 2

Effects of different seedling rearing treatments on the growth uniformity of seedlings %"

处理
Treatment		 株高
Plant height		 叶龄
Leaf age		 绿叶数
Number of green leaves
NT 76.3 79.0 76.0
T 84.2 88.2 79.3

Table 3

Effects of different seedling treatments on yield and its components of early rice"

处理
Treatment		 有效穗数
Effective panicle number
(×106/hm2)		 穗粒数
Grain number of
per panicle		 结实率
Seed-setting rate
(%)		 千粒重
1000-grain weight
(g)		 产量
Yield
(kg/hm2)
NT 2.97 122.5 85.0 25.5 7761.0
T 3.17 126.4 85.4 25.4 8593.5
增减
Increase or decrease (%)		 7.00 3.2 0.6 -0.4 10.7
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