关键词: 高粱, 晋糯3号, 种植模式, 产量, 养分吸收

Abstract:

A field experiment was carried out to study the effects of planting patterns on yield and nutrient accumulation of sorghum Jinnuo 3 at three row spacing: 30cm, 50cm and 60cm. There were four densities:45 000, 75 000, 105 000 and 135 000 plants/hm ² under each row spacing. The results showed that row spacing of 50cm resulted in the highest leaf area per plant, leaf area index, grains per panicle and grain yield among all row spacing treatments. For the same rowing space, although the density of 135 000 plants/hm ² had higher yield but it was not significantly different from the density of 105 000 plants/hm ². The density of 45 000 plants/hm ² significantly increased grains per panicle, which was 1.8-2.0 times those of 105 000 and 135 000 plants/hm ², its yield was 72%-88% of the highest yield for the same rowing space. This implies that Jinnuo 3 has a strong ability to regulate the population by rowing space of 50cm, N absorption after anthesis stage was significantly higher with the density of 45 000 plants/hm ². Perhaps this explains the reason for the relatively high yield when such low density was employed. Both row spacing of 50cm and 60cm with densities of 105 000 and 135 000 plants/hm ² had a similar high yield. Rowing space of 50cm with the density of 105 000-135 000 plants/hm ² was recommended since it had a higher NPK absorption compared with that of 60cm rowing space.

Key words: Sorghum, Jinnuo 3, Planting patterns, Yield, Nutrient absorption