关键词:粳稻; 理想株型; 每穴苗数; 干物质; 倒伏指数 Effects of Seedlings per Hole on Matter Production Characteristics and Lodging Resistance inJaponica Rice with Different Panicle Types XU Na1, WANG Jia-Yu1, LI Qing1, YANG Xian-Li1, LIU Zun-Qi1, JING Yan-Hui2, XU Zheng-Jin1,* 1Rice Research Institute, Shenyang Agricultural University / Key Laboratory of Northeast Rice Biology and Breeding, Ministry of Agriculture, Shenyang 110866, China
2Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
Fund: AbstractThe effects of planting seedlings per hole on the rice matter production characteristics and lodging resistance were studied using the idealjaponica rice varieties Ri22 and Shennong 265 in 2012-2013. The main results were as follows: (1) Dry matter accumulation and total dry matter accumulation of Ri22 and Shennong 265 before or after heading increased with the increasing of seedlings per hole, the transport rate and contribution rate of stem and leaf showed the opposite trend. (2) There was a slight influence on internode bending moment and lodging index of Ri22 and Shennong 265 with different seedlings per hole. Internode bending moment decreased slightly with the increasing of seedlings per hole, the lodging index showed the opposite. (3) With the increasing of seedlings per hole, the effective panicles of Ri22 and Shennong 265 increased and the total grains per panicle decreased significantly, while seed setting rate and 1000-grain weight had little changed. (4) The yield of Ri22 and Shennong 265 increased slightly with the increasing of seedlings per hole. In order to achieve the unity of high yield and lodging resistance, the suitable density for Ri22 in Shenyang should be 2-4 seedlings per hole, and more than that density for Shennong 265.
Keyword:Japonica rice; Ideal plant type; Seedlings per hole; Dry matter; Lodging index Show Figures Show Figures
表1 每穴苗数对干物质积累的影响 Table 1 Effect of seedlings per hole on dry matter accumulation
品种 Variety
处理 Treatment (seedlings per hole)
干物质生产量DMA (g plant-1)
总干重 TDMA (g plant-1)
干物质生产量占总干重比例Ratio (%)
抽穗前 Before heading
抽穗后 After heading
抽穗前 Before heading
抽穗后 After heading
2012
Ri22
2
43.97 a
19.39 b
63.36 b
69.89 a
30.11 a
4
44.21 a
35.62 a
79.84 ab
55.52 a
44.48 a
6
48.26 a
38.47 a
86.73 a
57.49 a
42.51 a
沈农265 Shennong 265
2
40.01 a
33.27 a
73.78 ab
54.54 a
45.46 a
4
43.07 a
25.77 ab
68.83 b
62.81 a
37.19 a
6
44.26 a
28.96 ab
73.22 b
60.84 a
39.16 a
2013
Ri22
2
44.94 b
20.24 c
65.18 c
69.04 a
30.96 b
4
59.67 a
31.66 b
91.32 ab
65.34 ab
34.66 b
6
58.21 a
37.98 a
96.19 a
60.74 b
39.26 ab
沈农265 Shennong 265
2
39.39 b
33.05 b
72.44 c
54.38 b
45.62 a
4
53.76 a
31.43 b
85.19 b
63.14 a
36.86 b
6
54.41 a
44.03 a
98.45 a
55.34 b
44.66 a
表中数据后跟不同字母者表示在 P=0.05水平时差异显著。 Values followed by different letters are significantly different at the 5% probability level. DMA: dry matter accumulation; TDMA: total dry matter accumulation; Ratio: ratio of DMA/TDMA.
表1 每穴苗数对干物质积累的影响 Table 1 Effect of seedlings per hole on dry matter accumulation
表2 每穴苗数对茎鞘和叶片物质转运的影响 Table 2 Effect of seedlings per hole on matter transport of stem and leaf
品种 Variety
处理 Treatment (seedlings per hole)
茎鞘Stem + sheath
叶片Leaf
茎鞘+叶片Stem + sheath + leaf
转运率 TR (%)
贡献率 CR (%)
转运率 TR (%)
贡献率 CR (%)
转运率 TR (%)
贡献率 CR (%)
2012
Ri22
2
14.02 a
13.26 a
25.95 a
12.78 a
18.11 a
26.05 a
4
-16.40 a
-11.27 a
16.38 a
7.04 a
-3.78 b
-4.23 b
6
-17.91 a
-13.37 a
13.04 a
5.80 a
-6.36 b
-7.57 b
沈农265 Shennong 265
2
-15.36 a
-10.91 a
13.88 a
5.50 a
-4.89 b
-5.41 b
4
-3.26 a
-2.83 a
22.02 a
10.99 a
5.97 ab
8.16 ab
6
-6.16 a
-5.12 a
20.75 a
9.84 a
3.62 ab
4.72 ab
2013
Ri22
2
21.98 a
20.30 a
31.16 a
11.11 a
24.54 a
31.41 a
4
6.21 ab
6.02 ab
26.21 ab
9.84 a
11.80 b
15.86 ab
6
-1.94 b
-1.64 b
24.34 ab
8.70 a
5.87 bc
7.06 b
沈农265 Shennong 265
2
-32.02 c
-29.24 c
18.62 b
6.95 a
-17.32 d
-22.28 c
4
-1.79 b
-1.70 b
29.32 a
11.68 a
7.40 c
9.98 b
6
-14.12 b
-10.78 b
21.68 ab
7.58 a
-2.87 c
-3.20 b
表中数据后跟不同字母者表示在 P=0.05水平时差异显著。 Values followed by different letters are significantly different at 0.05 probability level. TR: transport rate; CR: contribution rate.
表2 每穴苗数对茎鞘和叶片物质转运的影响 Table 2 Effect of seedlings per hole on matter transport of stem and leaf
图2 每穴苗数对各节间粗的影响图中不同字母表示在 P=0.05水平时差异显著。Fig. 2 Effect of seedlings per hole on internode diameterBand superscripted by different letters are significantly different at 0.05 probability level.
表4 每穴苗数对产量及其构成因素的影响 Table 4 Effect of seedlings per hole on yield and yield componentsValues followed by different letters are significantly different at 0.05 probability level.(1) accounts for a proportion of two seedlings per hole.
品种 Variety
处理 Treatment (seedlings per hole)
穗数 Effective panicle
穗粒数 Total grains per panicle
结实率 Seed setting rate
千粒重 1000-grain weight
产量 Yield
Panicle hole-1
%(1)
Grains panicle-1
%(1)
%
%(1)
g
%(1)
kg hm-2
%(1)
2012
Ri22
2
7.93 e
100
221.30 a
100
90.21 b
100
26.73 a
100
6247.56 b
100
4
11.53 d
145
176.07 b
80
90.80 b
101
25.34 b
95
7739.42 ab
124
6
13.47 c
170
154.82 c
70
89.58 c
99
25.50 b
95
8530.93 a
137
沈农265 Shennong 265
2
13.60 c
100
124.74 d
100
94.59 a
100
22.82 c
100
7314.76 ab
100
4
16.27 b
120
108.16 e
87
94.40 a
100
21.96 d
96
7437.05 ab
102
6
19.26 a
142
88.76 f
71
94.70 a
100
21.74 d
95
8041.79 a
110
2013
Ri22
2
9.33 e
100
194.63 a
100
92.52 b
100
29.31 b
100
8671.00 b
100
4
11.90 d
128
177.12 b
91
88.47 c
96
29.05 b
99
9360.23 ab
108
6
12.87 c
138
154.31 c
79
86.77 c
94
28.98 b
99
9971.65 ab
115
沈农265 Shennong 265
2
13.07 c
100
123.48 d
100
95.82 a
100
25.49 a
100
8381.96 b
100
4
15.83 b
121
131.24 d
106
95.61 a
100
25.33 a
99
9060.08 b
108
6
17.77 a
136
121.36 d
98
94.37 ab
98
24.67 a
97
10727.58 a
128
表4 每穴苗数对产量及其构成因素的影响 Table 4 Effect of seedlings per hole on yield and yield componentsValues followed by different letters are significantly different at 0.05 probability level.(1) accounts for a proportion of two seedlings per hole.
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