Effects of Cultivation Patterns on Yield and Nitrogen Uptake and Utilization of Jinza 34

doi:10.7668/hbnxb.201751208

Abstract

Abstract: To determine the best cultivation mode of a new sorghum cultivar Jinza 34, field experiments were conducted. In 2014, the effects of different densities (12.0, 13.5, 15.0, 16.5, 18.0, 19.5 ten-thousand plants/ha) on growth and yield of Jinza 34 were studied in 50 cm row spacing. In 2015, the effects of 9 patterns of cultivation models on the yield, nitrogen absorption and utilization were studied. Row space of 50 cm, 60 cm and 30 cm+70 cm were set up, with different densities of 12.0, 15.0, 18.0 ten-thousand of plants/ha, respectively, under different row spacing. The results showed that with the increased of density, sorghum stem diameter and leaf area per plant decreased, and leaf area index increased. Row spacing significantly affected plant height and biomass, and biomass of 60 cm was higher than that of other row spacing. The biomass of 60 cm was 10.12-11.25 t/ha. The increase of density significantly reduced the grain weight of single spike. In 2014, the weight of single spike of 12.0 ten-thousand of plants/ha was as high as 81.20 g, and that of 12 ten-thousand of plants/ha in 2015 was 65.38-73.04 g. Row spacing significantly affected 1 000-grain weight and reached maximum at 60 cm. In 2014, the grain yield of 18 ten-thousand of plants/ha was higher than that of other treatments. In the dry year of 2015, the grain yield of the 60 cm row spacing density of 15.0 ten-thousand of plants/ha was the highest, being 10 721.61 kg/ha. Low density promoted the uptake and accumulation of nitrogen before flowering stage, and increased the transfer of nitrogen to the grain from vegetative organs. Row spacing regulates nitrogen uptake after spike flowering, and 60 cm had relative high nitrogen uptake. Correlation analysis showed that there was a significant positive correlation between nitrogen accumulation and grain yield after spike flowering, and nitrogen transfer rate was negatively correlated for grain yield. In summary, different cultivation patterns affect grain yield by regulating sorghum growth and nitrogen absorption. It is very important to regulate the nitrogen uptake after panicle flowering stage through the cultivation mode. We find that 60 cm row spacing density of 15.0 ten-thousand of plants/ha is suitable cultivation mode for Jinza 34.

Key words: Sorghum, Cultivation mode, Jinza 34, Yield, Nitrogen uptake

CLC Number:

S143.1
S514

DONG Erwei, WANG Jinsong, JIAO Xiaoyan, WU Ailian, NAN Jiangkuan, GUO Jun, WANG Lige. Effects of Cultivation Patterns on Yield and Nitrogen Uptake and Utilization of Jinza 34[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(1): 196-203. doi: 10.7668/hbnxb.201751208.

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