播期和种植密度对甜高粱新组合农艺性状及产量的影响

doi:10.19640/j.cnki.jtau.2026.02.001

Journal of Tianjin Agricultural University ›› 2026, Vol. 33 ›› Issue (2): 1-5.doi: 10.19640/j.cnki.jtau.2026.02.001

Effect of sowing date and density on agronomic traits and yield of sweet sorghum hybrids

Guan Zheng, Wu Wenwen, Sun Shoujun, Gao Jianming, Luo Feng^{Corresponding Author}, Pei Zhongyou^{Corresponding Author}

Key Laboratory of Crop Genetics and Breeding, College of Agronomy and Resource Environment, Tianjin Agricultural University, Tianjin 300392, China

Received:2024-08-05 Online:2026-04-30 Published:2026-05-06

Abstract

Abstract: In order to determine the suitable sowing date and density of new sweet sorghum combinations, seven new sweet sorghum combinations（44A/GW3968, 44A/GW3998, 29A/GW3968, 7A/Lio, 34A/Lio, 44A/Lio, 34A/GW3968）were used as experimental materials by contrast with ‘Tianza2’, and three sowing dates were set by split plot experiment. The results showed that the agronomic characters and yield of sweet sorghum were significantly affected by sowing date, and the agronomic characters and yield of sweet sorghum decreased significantly with sowing date delayed, but the biological yield of new combinations was lower than that of ‘Tianza2’ in the first sowing date, and the optimum sowing date of different new combinations was April 30. With the increase of planting density, the plant height and stem diameter of sweet sorghum decreased significantly, but there was no significant difference in ear length, ear weight and yield among the treatments. However, the optimum density of different new combinations to achieve the maximum biological yield was different, and the optimum density of 44A/GW3968 and 34A/Lio was 90 000 plants/hm². The suitable density of 44A/GW3998, 29A/GW3968, 34A/GW3968, 44A/Lio and ‘Tianza2’ is 75 000 plants/hm²; The suitable density of 7A/Lio is 82 500 plants/hm². This study clarifies the suitable sowing dates and planting density configurations for various new sweet sorghum combinations in North China, providing a reference for variety promotion and cultivation optimization.

Key words: sweet sorghum, agronomic traits, yield, sowing period, density

CLC Number:

S514

Guan Zheng, Wu Wenwen, Sun Shoujun, Gao Jianming, Luo Feng, Pei Zhongyou. Effect of sowing date and density on agronomic traits and yield of sweet sorghum hybrids[J]. Journal of Tianjin Agricultural University, 2026, 33(2): 1-5.

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Effect of sowing date and density on agronomic traits and yield of sweet sorghum hybrids

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