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Growth and Productivity of Winter Maize (Zea mays L.) under Different Levels of Nitrogen and Plant Population  


Abstract Category: Science
Course / Degree: Master of Science in Agriculture (Agronomy)
Institution / University: Tribhuvan University, Institute of Agriculture and Animal Science, Rampur, Chitwan, Nepal., Nepal
Published in: 2013


Thesis Abstract / Summary:

A field experiment was conducted at farmer’s field of Anandapur, Mangalpur VDC-3, Chitwan, Nepal during winter season from September 2006 to February 2007 to study the effects of nitrogen and plant population on maize. Fifteen treatment combinations consisting of five levels of nitrogen: 0, 50, 100, 150 and 200 kg N/ha and three levels of plant population; 55,555 plants/ha (60 cm x 30 cm spacing), 66,666 plants/ha (60 cm x     25 cm spacing) and 83,333 plants/ha (60 cm x 20 cm spacing) were tested in factorial randomized complete block design (RCBD) with 3 replications. “Rampur Composite” variety of maize was planted on sandy silt loam and strongly acidic soil having medium in total nitrogen (0.123%), high in soil available phosphorous (77.56 kg/ha) and low in soil available potassium (23.25 kg/ha). The research findings revealed that each level of nitrogen significantly increased grain yield upto 200 kg N/ha. The grain yield (6514.48 kg/ha) obtained under 200 kg N/ha was significantly higher than that of 0, 50, 100 and 150 kg N/ha. The percent increment in yield due to application of 50, 100, 150 and 200 kg N/ha was to the extent of 62.11, 104.74, 135.68 and 154.74%, respectively over control. Significant effect on grain yield due to different levels of plant population was observed. The grain yield (5113.46 kg/ha) obtained under 66,666 plants/ha was statistically at par with that under 83,333 plants/ha, but significantly superior over that under 55,555 plants/ha. The interaction between different nitrogen levels and plant densities on grain yield showed that the highest grain yield (6925.79 kg/ha) was obtained under treatment of 200 kg N/ha + 66,666 plants/ha. The yield attributes namely number of cobs/plant, cob length, cob diameter, number of grain rows/cob and 1000 seed weight significantly increased with increasing N levels and decreasing plant population levels. The number of barren plants/ha decreased with increasing levels of N but increased with increasing levels of plant population. The net return (Rs. 42188.74/ha) and benefit:cost ratio (1.67) obtained under 200 kg N/ha were significantly highest than that obtained under other levels of nitrogen (150, 100, 50 and 0 kg N/ha). The plant population of 66,666 plants/ha gave the highest net returns (Rs. 25812.28) which was 10.19 and 49.64% higher than that of 83,333 plants/ha and 55,555 plants/ha, respectively. The benefit: cost ratio (1.44) obtained under 66,666 plants/ha was significantly higher than that of 55,555 and 83,333 plants/ha. The interaction between different nitrogen levels and plant densities on economics of maize production showed that significantly highest net return (Rs.48606.98) and B:C ratio (1.78) were under treatment of 200 kg N/ha + 66,666 plants/ha. The highest grain yield and maximum profit were obtained when maize variety “Rampur Composite” was planted with 200 kg N/ha and plant population level of 66,666 plants/ha (60 cm x 25 cm spacing).


Thesis Keywords/Search Tags:
Maize, productivity, nitrogen and plant population

This Thesis Abstract may be cited as follows:
Shrestha, J. 2007. Growth and productivity of winter maize (Zea mays L.) under different levels of nitrogen and plant population. Thesis, M.Sc.Ag, Tribhuvan University, Institute of Agriculture and Animal Science, Rampur, Chitwan, Nepal.


Submission Details: Thesis Abstract submitted by Jiban Shrestha from Nepal on 20-Jul-2013 20:45.
Abstract has been viewed 2656 times (since 7 Mar 2010).

Jiban Shrestha Contact Details: Email: jibshrestha@yahoo.com



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