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CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2020, Vol. 42 ›› Issue (6): 970-.doi: 10.19802/j.issn.1007-9084.2020218

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Effect of different density on canopy structure and pod yield of peanut under single seed precision sowing

  

  1. 1. Hunan Agriculture University/Changsha Branch of National Peanut Engineering Technology Research Center,Changsha 410128, China;
    2. College of Biology and Environment Engineering, Binzhou University, Binzhou 256600,China; 3. Shandong Peanut Research Institute/National Peanut Engineering Technology Research Center,Qingdao 266100, China; 4. Shandong Academy of Agricultural Sciences, Jinan 250100, China; 5. Liaocheng Academy of Agri⁃cultural Sciences, Liaocheng 252000 , China
  • Online:2020-12-28 Published:2020-11-19

Abstract: To explore the effect of density on canopy structure and yield of single seed precision sowing pea⁃
nut, two sowing models of single seed and double seeds per hole, three planting densities of 90 000 holes / hm2 (D1),
120 000 holes / hm2 (D2) and 150 000 holes / hm2 (D3) were set with Huayu 22 in test fields. Canopy transmittance,
canopy leaf area index, leaf dry weight and agronomic traits of peanut at different densities were investigated. The
results showed that the light transmittance of the middle and lower parts of the canopy decreased with the increase
of the density, and the single seed model was higher than that of the double seeds. Under D1 density, the leaf area
index and dry weight of single seed sowing were lower than those of double seed sowing, but the middle and lower
part of canopy were higher than that of double seed sowing. However, under the density of D2 and D3, the leaf area
index and leaf dry weight of single and double seed sowing had no significant difference. With the increase of densi⁃
ty, the main stem height, lateral branch length and the number of fruits per hectare increased significantly, while the
number of fruit per hole decreased. The lateral branch number of single seed precision sowing was higher than that
of double seed sowing. With the increase of density, the pod yield of peanut increased first and then decreased. The
pod yield of 120 000 holes / hm2 was the highest, and the yield of single seed precision sowing was slightly higher
than that of double seed sowing. In conclusion, rational close planting was an important measure for high yield of
peanut. Compared with double seed sowing, single seed precision sowing peanut had higher light transmittance and
leaf area index of the lower parts of the canopy, more lateral branches and higher fruit filling rate, which was crucial
in high yield and high efficiency of peanut.

Key words:  , plant density;peanut;single-seed precision sowing;canopy structure;pod yield

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