Crops ›› 2019, Vol. 35 ›› Issue (1): 111-115.doi: 10.16035/j.issn.1001-7283.2019.01.018

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Regulation Effects of Narrow-Double Row Precision Sowing with Subsoiling on Yield in Summer Maize

Qian Liang1,Wenya Liu1,Junzhu Ge1,Ming Zhao2,Haipeng Hou3,Yong′an Yang4,Decai Xin1   

  1. 1 College of Agronomy & Resources and Environment, Tianjin Agricultural University, Tianjin 300384, China;
    2 Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
    3 Tianjin Agricultural Technology Promotion Station, Tianjin 300061, China
    4 Tianjin Maize Elite Seed Farm, Tianjin 301500, China
  • Received:2018-08-04 Revised:2018-12-16 Online:2019-02-15 Published:2019-02-01
  • Contact: Junzhu Ge

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Abstract:

In order to study the regulation effects of the narrow-double row precision sowing with subsoiling on maize yield, a field experiment was conducted by using Jingnongke 728 and Tianta 619 as the testing materials. The results showed that the soil bulk density in 0-10cm depth was reduced by 6.64%-17.42%. Summer maize leaf area index were increased by 26.78%-46.11% (P<0.05), while net assimilation rates during emergence to 6 leaf, 6 leaf to silking and silking to maturity were increased by 16.27%-25.82%, 5.23%-35.41% and 3.83%-31.40%, respectively. Therefore, summer maize dry matters increased significantly. Under the treatment of narrow-double row precision sowing with deep-spinning, summer maize ear number were increased by 19.73%-24.68% (P<0.05), and the ear length increased, bald-tip length shortened, row grain number and ear grain number increased significantly, but the 1000-grain weight decreased significantly, so that both the actual and theoretical yields of summer maize increased significantly.

Key words: The technology of narrow-double row precision sowing with deep-spinning, Summer maize, Dry matter, Yield, Yield component

Table 1

Effect of subsoiling on bulk density at 0~30cm soil depth g/cm3"

处理
Treatment		 土层Soil depth (cm)
0~5 5~10 10~20 20~30
CK 1.21 1.47 1.53 1.49
SS 1.13 1.22 1.52 1.46

Fig.1

Effects of subsoiling on summer maize leaf area index JNK728: Jingnongke 728, TT619: Tianta 619. SS: Narrow-double row precision sowing with subsoiling, CK: Notillage. Values followed by different letters are significantly different at the 0.05 probability level. The same below"

Table 2

Effects of subsoiling on summer maize dry matter distribution %"

品种
Variety		 处理
Treatment		 茎鞘占比
Stem-sheath ratio		 叶片占比
Leaf ratio		 苞叶占比
Husk ratio		 穗轴占比
Cob ratio		 收获指数
Harvest index
京农科728 Jingnongke 728 SS 17.69±0.78a 9.72±1.12a 4.97±0.37a 9.75±0.40a 48.95±2.26ab
CK 20.23±2.60a 10.86±0.69a 3.91±1.85a 9.34±0.66ab 45.77±0.70b
天塔619 Tianta 619 SS 19.62±0.52a 8.20±2.68a 4.11±2.04a 8.41±1.03b 51.11±4.30a
CK 19.34±8.14a 10.47±0.89a 3.51±1.65a 8.32±0.25b 48.75±1.21ab

Fig.2

Effects of subsoiling on summer maize dry matter weight"

Fig.3

Effects of subsoiling on summer maize net assimilation rate"

Fig.4

Effects of subsoiling on summer maize grain yield"

Table 3

Effects of subsoiling on summer maize yield components"

品种
Variety		 处理
Treatment		 有效穗数
(104/hm2)
Ear number		 穗粒数
Grains
per ear		 千粒重(g)
1000-grain
weight		 穗行数
Rows
per ear		 行粒数
Grains
per row		 出子率(%)
Rate
of seed		 穗长(cm)
Ear length		 秃尖长(cm)
Bald
tip length		 穗粗(mm)
Ear
diameter
京农科728 Jingnongke 728 SS 8.89a 411.73ab 327.15ab 13.46a 28.57b 87.82a 14.14b 2.20a 46.60a
CK 7.13b 413.10ab 361.10a 13.77a 29.98ab 84.08b 15.24ab 2.21a 31.44a
天塔619 Tianta 619 SS 8.98a 465.20a 305.86b 13.44a 34.64a 89.32a 16.64a 1.28b 29.39a
CK 7.50b 359.99b 363.48a 13.05a 27.40b 86.84ab 13.92b 2.54a 30.54a
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