RESPONSE OF MUSTARD (Brassica juncea L.) VARIETIES TO TIME OF N APPLICATION AND THINNING UNDER MIDDLE GUJARAT CONDITIONS
Loading...
Date
1997
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
AAU, Anand
Abstract
A field experiment was conducted on sandy loam soil at College Agronomy Farm, Gujarat Agricultural University, Anand Campus, Anand during rabi season of 1995-96 to study the "Response of Mustard Varieties to Time of N Application and Thinning Under Middle Gujarat Conditions". Eighteen treatment comprising of three varieties (Varuna, GM 1 and GM 2), two times of N application (Full N as basal and half N as basal + half N at 30 DAS) and three times of thinning (20, 25 and 30 DAS) were tried in randomized block design with four replications. 'Among different varieties tried, variety GM 2 produced significantly higher seed yield (2144.54 kg ha-1 ) than other varieties. This variety also recorded the higher values of number of primary and secondary branches per plant, number of seeds per sillqua, number of sillquae per plant, stover yield and oil yield. The higher plant height and test weight was recorded under variety Varuna. Variety Gujarat mustard 2 also showed its superiority over variety Varuna in almost all the characters studied. Plant population and P content of stover was remained unaffected due to varieties. The maximum-net realization of Rs. 11763.83 ha-1 with the CBR 1:3.18 was also recorded higher under Gujarat mustard 2. Significantly higher seed (2072.75 kg ha-1) and stover yields (4355 kg ha-1) were recorded under splits application of N (half N as basal + half N at '30 DAS) than full nitrogen given as basal. The yield and yield attributes like plant height, number of primary and secondary branches per plant, number of siliquae per plant, harvest index, oil yield and N content of stover and P content of seed and stover were also recorded significantly higher under this treatment. However, plant population, length of sillqua, number of seeds per siliqua, test weight, oil and protein content and N content of seed were not influenced by the time of N application. Split application of N also gave the maximum net realization of Rs. 11264.88 ha-1 with the GBR of 1:3.12. Thinning the crop at 26 DAS produced the higher seed yield than plant thinned at 20 and 30 DAS. However, there was no much variation in seed yield among thinning treatment.' This treatment also recorded the higher values of number of primary and secondary branches per plant, number of seeds per siliqua, stover and oil yields. However, plant thinned at 30 DAS produced taller plant during initial growth stage upto 50 DAS. The plant population, length of siliqua, number of siliquae per plant, test weight, harvest index, oil and protein content of seed and N and P content of seed and stover remained unaffected due to the various thinning treatments. Thinning at 25 DAS also gave the maximum net realization of Rs. 11995.83 ha-1 with the GBR of 1:3.04. During the course of investigation, the interaction effect between variety x time of N application was found significant with respect to plant height at 70 DAS, number of primary and secondary branches per plant, protein and N content of seed. Likewise, significant interaction between time of N application x time of thinning was also observed for number of primary branches per plant and stover yield. Based on one year experimentation, it is concluded mustard variety GM-2 gives higher seed yield and net realization when plants were thinned at 25 DAS and recommended dose of N applied in two splits, half at sowing and half 30 DAS under middle Gujarat agro-climatic conditions.
Description
Keywords
AGRONOMY, AGRICULTURE, A STUDY