Productivity of maize (Zea mays L.) as affected by varieties and sowing dates

Abstract

Genotypic yield potential of maize varieties is greatly affected by sowing dates. In order to investigate the effects of sowing dates and varieties on the grain yield of maize, the field experiment was carried out at research field of National Maize Research Program (NMRP), Rampur, Chitwan, Nepal from April 2009 to March 2010. Three varieties namely Rampur Composite, Arun-2 and Gaurav were sown at every week. The results of experiment showed that interaction effect of variety and sowing date on grain yield of maize was significant. Rampur Composite produced highest grain yield (6.1 t/ha) in August and lowest yield (2.6 t/ha) in May. Similarly Arun-2 produced highest yield (4.6 t/ha) in August and lowest yield (2.1 t/ha) in May. Gaurav produced highest grain yield (5.1 t/ha) in September followed by 4.9, 4.8 and 4.6 t/ha in February, July and August respectively and lowest yield (1.5 t/ha) in November. The sowing date was highly significant on grain production. The highest grain production was 5.1 t/ha in August followed by in February (4.9 t/ha), September (4.6 t/ha) and March (4.4 t/ha) respectively. The lowest grain yield was produced in May (2.4 t/ha). Therefore it was concluded that August planting was best for higher grain production of maize varieties (Rampur Composite, Arun-2 and Gaurav) in terai region of Nepal.

IMPACT ASSESSMENT OF DIFFERENT SOWING DATES ON MAIZE APHID, Rhopalosiphum madis INFESTATION IN BANGLADESH

“…The minimum (130.28g) grain weight cob -1 was recorded in S1. This result agrees with the finding by Gurung et al, 2018 that optimum planting dates resulted in higher grain weight per cob than early and late planting dates because of higher cob numbers and greater grain number per plants.…”

“…Maximum (10.56 t ha -1 ) grain yield was observed sown on 1 st week of November (S3) followed by S4(10.24 t ha -1 ), S5(9.95 t ha -1 ), S6(9.86 t ha -1 ), S7(7.94 t ha -1 ), S8(7.02 t ha -1 ), S9(6.0 t ha -1 ) and S2(5.85 t ha -1 ), respectively. However, minimum (5.63 t ha -1 ) grain yield was noted sown on 3 rd week of October (S1) (Gurung et al, 2018;Anwar et al, 2011;Chander et al, 2016;Buriro et al, 2015). They reported that the maximum grain yield was obtained from the 1 st week of November sowing dates because of less incidence of aphid and minimum damage of grain.…”

Effect of Different Doses of Nitrogen on Production of Spring Maize (Zea Mays) in Gulmi, Nepal

“…This formula was also adopted to adjust the grain yield (kg ha -1 ) at 15% moisture content. This adjusted grain yield (kg ha -1 ) was again converted to grain yield (t ha -1 ) (Carangal et al, 1971;Shrestha et al, 2019;Shrestha et al, 2018;Gurung et al, 2018;Sharma et al, 2019;Sharma et al, 2016;Bartaula et al, 2019).…”

Effect of Plant Spacing to Growth and Yield of Hybrid Maize (Zea mays L.)

“…Low dense of plant spacing caused the competition between crop and weed in obtaining the water, nutrients and sunlight. It also caused the high obtained sunlight intensity so that it caused the disrupted growth [13]. High plant could obtain full light intensity so that it increased dry matter supply to leaf, stem and grain that stimulated growth and biomass of plant [14].…”