Optimum Sowing Date, Planting Density and Row Spacing of Winter Wheat in Low Plain Around Bohai Under Limited Irrigation

doi:10.11924/j.issn.1000-6850.casb15110137

Abstract

Abstract: The article aims to explore the optimum combination of sowing date, planting density and best spatial distribution under the limited irrigation for winter wheat in low plain around Bohai.‘Cangmai6005’ was used as material, a split plot design was conducted with 5 sowing dates (A1-A5) as main treatment and 4 planting densities (B1-B4) as secondary treatment. The group composition, dry matter accumulation, leaf area index (LAI) and yield of‘Cangmai 6005’were studied. The results showed that the population quantity and yield decreased with the delay of sowing date. Under suitable sowing time, the population quantity and yield increased first and then decreased with improved sowing density. Increasing sowing density in late sowing time could increase the yield. Suitable sowing time was helpful to increase the LAI and dry matter accumulation of population. Proper late sowing could reduce the invalid tillers and invalid leaf area to raise the spike rate. Different row spacing had an obvious influence on wheat yield. The best row spacing was 20 cm. It is suggested that the sowing date from October 3rd to 13th and the sowing density from 3.75 million/hm2 to 4.5 million/hm2 are suitable for‘Cangmai6005’in low plain around Bohai.

CLC Number:

S512.1

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