Abstract
Three years (2014-15 to 2016-17) experimental data collected at Pulse Research Station, Vadodara was used to calibrate and validate the CROPGRO- pigeon pea model for three cultivars of pigeon pea (BDN 2, AGT 2 and Vaishali). The validated model was used to simulate the seed yield by changing the maximum and minimum temperature (-30 to +30C) in different months (June to January)and rainfall (-25% to +25%) during July, August and September. Results revealed that the elevated temperature had negative effect on seed yield and reduced temperature had positive effect. Among the varieties, AGT 2 was least affected by the temperatures and rainfall. Vaishali was found to be most sensitive to elevated temperature.Higher rainfall during August was beneficial on seed yield of pigeon pea. Pigeon pea sown in June was most affected due to elevated temperatures and July sown was most affected by rainfall. The effect of minimum temperature on seed yield was less than that observed with maximum temperature.
Highlights
Pigeon pea [Cajanus cajan (L.) Millsp] commonly known as arhar, red gram or tur is a legume crop belonging to the family Fabaceae and subfamily Papilionaceae
Patil et al (2018) have reported the effect of intra-seasonal variation of temperature on tuber yield of potato in Gujarat.Yadav et al, (2016) had attempted to predict the productivity of different crops under changing climatic conditions using DSSAT group of models.In this paper an attempt has been made to assess the effect of intra-seasonal variation in temperatures and rainfall on seed yield of pigeon pea in middle Gujarat using CROPGRO- pigeon pea model
Among different dates of sowing, the maximum seed yield (1825 kg ha-1) was observed in first date i.e. June 19 sown pigeon pea followed by July 1 (1775 kg ha-1), July 15 (1452 kg ha-1), July 30 (1143 kg ha-1) and the lowest (904 kg ha-1) in late sown (August 14) pigeon pea
Summary
Pigeon pea [Cajanus cajan (L.) Millsp] commonly known as arhar, red gram or tur is a legume crop belonging to the family Fabaceae and subfamily Papilionaceae. The validated CROPGRO-pigeon pea model was used to studythe effect of intra seasonal variation of temperatures and rainfall on seed yield of all three varieties sown on five dates by incremental change in the monthly maximum and minimum temperatures from -30C to 30C during June to January months at 10C interval and rainfall change by ±10, ±15 and ±25 per cent during July to August.
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