Crops ›› 2016, Vol. 32 ›› Issue (2): 139-144.doi: 10.16035/j.issn.1001-7283.2016.02.026

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Effects of Seedling-Strengthen Agent and Quantity on Improving Seedling Quality and Grain Yield in Super Rice Longdao 5

Ding Guohua1,Yang Guang2,Bai Liangming1,Sun Shichen1,Jiang Shukun1,Wang Tongtong1,Zheng Hongliang1,Xia Tianshu1,Zhang Fengming1,Chen Wanchun3   

  1. 1 Crop Tillage and Cultivation Institute,Heilongjiang Academy of Agricultural Sciences/Northern Japonica Rice Molecular Breeding Joint Research Center,Chinese Academy of Sciences,Harbin 150086,Heilongjiang,China
    2 Institute of Economic Crop of Liaoning,Liaoyang 111000,Liaoning,China
    3 Extension Centre of Agricultural Technology in Mulan County of Heilongjiang,Mulan 151900,Heilongjiang,China
  • Received:2015-12-31 Revised:2016-02-23 Online:2016-04-15 Published:2018-08-26
  • Contact: Fengming Zhang

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Abstract:

The experiment was conducted to investigate the effects of different seedling-strengthening agents (SSA) and quantity on seedling quality and yield of super rice Longdao5 under the early spring, dry-land-raised condition. The objective of this study was to discuss a series of control measures to make the strong seedling population and suitable seedling age at rice seedling stage. The results showed that the traits of shoot fresh and dry weight, plant height, maximum leaf length, leaf width, leaf area, foliar age, height of leaf sheath, stem base width, final tillers, percentage of filled grain, under the treatment of using SSA were significantly higher than control, respectively. And the results also indicated that the main reason for increasing yield under the treatment of using SSA was higher grain setting percentage in secondary spikelet and spike number. In addition, the speed of emergence for treatment 3, 4 was slower than other treatment, but, root shoot ratio and root dry weight for treatment 3, 4 was higher at the seedling stage. The leaf length and plant height of treatment 5 was much taller than other treatments, but plant dry weight per unit length was smaller than treatment 1, 2, 3, 4, respectively.

Key words: Seedling strengthen agent (SSA), Rice, Seedling quality, Yield

Fig.1

Effect of different seedling strengthen agent (SSA) on overground part fresh weight per 100 plants Different capital and small letters indicate significant difference at 0.01 and 0.05 level among five treatments, respectively. The same below"

Fig.2

Effect of different SSA on overground part dry weight per 100 plants"

Table 1

Effects of different SSA and dosage on seedling quality of Longdao5"

处理
Treatment		 苗基宽SBW
(cm)		 叶长LL
(cm)		 叶宽LW
(cm)		 叶面积LA
(cm2)		 叶挺长HLS
(cm)		 根数RN
(条)		 叶龄LA′ 地上部含水量
WPOP(%)		 根含水量WPR(%) 充实度DMUL
(g/cm)
CK 1.5Cc 3.9Cd 0.24Cc 0.71Dd 2.9Cc 5.1Aa 2.0Cd 0.732Cc 0.819BCc 0.113Bc
1 2.1ABb 9.5Ab 0.39Aa 2.77Aa 5.4Aa 5.7Aa 3.1ABab 0.811ABab 0.853Aa 0.155ABab
2 2.1ABb 6.3Bc 0.32Bb 1.50Cc 4.2Bb 6.1Aa 2.9Bc 0.790Bb 0.819BCc 0.153ABab
3 2.0Bb 7.2Bc 0.40Aa 2.15Bb 4.4Bb 5.8Aa 3.2Aa 0.811ABab 0.824BCbc 0.158Aa
4 2.3Aa 6.8Bc 0.38Aa 1.95Bb 4.3Bb 5.6Aa 3.1ABab 0.793Bb 0.810Cc 0.165Aa
5 2.1ABb 10.5Aa 0.37Aa 2.92Aa 5.4Aa 5.3Aa 3.0ABbc 0.829Aa 0.842ABab 0.125ABbc

Fig.3

Effect of different SSA on root fresh weight per 100 plants"

Fig.4

Effect of different SSA on root dry weight per 100 plants"

Fig.5

Effect of different SSA on plant height"

Fig.6

Effect of different SSA on root shoot ratio"

Fig.7

Effect of different SSA on tiller dynamic"

Fig.8

Effect of different SSA on final tillers"

Table 2

Effect of different SSA and dosage on yield and yield components of Longdao 5"

处理
Treatment		 一次枝梗总粒数
PBGN		 一次枝梗瘪粒数
PBUGN		 一次枝梗实粒数
PBFGN		 一次枝梗结实率(%)
PBSSR		 一次枝梗数
NPB		 穗长(cm)
PL		 着粒密度(个/cm)
SD
CK 56.7Aa 1.8Aab 54.9Aa 96.7Ab 10.5Aa 16.7Bb 5.0ABbc
1 62.6Aa 1.7Aab 60.9Aa 97.3Aab 11.3Aa 17.6ABab 5.4Aab
2 61.8Aa 2.2Aa 59.6Aa 96.5Ab 10.6Aa 18.1Aa 5.5Aa
3 57.4Aa 0.8Ab 56.7Aa 98.7Aa 10.2Aa 17.3ABab 4.7Bc
4 59.8Aa 2.2Aa 57.6Aa 96.7Ab 10.6Aa 17.3ABab 5.3ABab
5 60.3Aa 1.7Aab 58.6Aa 97.3Aab 10.3Aa 17.4ABab 5.0ABbc
处理Treatment 二次枝梗总粒
数SBGN		 二次枝梗瘪粒
数SBUGN		 二次枝梗实粒
数SBFGN		 二次枝梗结实
率(%)SBSSR		 二次枝梗
数NSB		 穗粒数
NGPP		 穗实粒数
NFGP		 穗结实率(%)
SSR
CK 28.7BCbc 2.4Aa 26.3Cbc 90.5Bb 10.8ABab 86.4Bab 82.3Bab 95.2Cd
1 32.0ABabc 0.8Bbc 31.2ABabc 97.3Aa 11.8ABab 91.9ABab 89.5ABab 97.4ABabc
2 38.4Aa 1.5Bb 36.9Aa 96.1Aa 13.6Aa 99.3Aa 95.6Aa 96.3Bbc
3 33.0Aab 0.8Bbc 32.2Aab 97.2Aa 12.2Aab 93.6Aab 91.2ABab 97.3Aabc
4 28.2BCbc 0.6Bc 27.6ABCbc 97.8Aa 10.8ABab 86.9ABab 85.1ABab 97.9ABab
5 24.5BCc 0.6Bc 23.9Cc 98.1Aa 9.4Bb 81.9ABb 80.5Bb 98.4ABa
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