EFFECT OF CLIMATE CHANGE ON MUNGBEAN GROWTH AND PRODUCTIVITY UNDER EGYPTIAN CONDITIONS

Year 2018, Volume: 2 Issue: 2, 16 - 23, 08.12.2018

Ezzat Abd El Lateff , Mostafa Abd El-salam Mostafa Selım Medhat Tawfık Mohamad El-kramany Aziza Farrag

Abstract

In order to
study the proper heat regime as one of the most important factors for climate
change, seeds of mungbean Kawmy-1 variety were exposed to variable extreme
waves of temperatures (minimum - maximum ^oC ) through sowing the seeds on six
planting dates, viz: D1 (15 - 22 ^oC),
D2 (18 - 26 ^oC), D3 (22 - 32 ^oC), D4 (28 - 38 ^oC), D5 (27 - 37 ^oC) and D6 (15 - 22 ^oC). Mungbean planted in the heat regimes of (18
- 26 ^oC), (22 - 36 ^oC) and (28 - 38 ^oC) could complete their life cycle and
produced reasonable yield. Other heat regimes seem to be unfavorable for
mungbean since either the seeds did not germinate (15 - 22 ^oC) or the growth was retarded and in turn
no yield was obtained (15 - 22 ^oC).
Mungbean plant sown in the heat regime of (22 - 32 ^oC) matured earlier, being taller, producing
greater number of leaves and branches with heavier weight than that in the
other heat regimes. The reduction in minimum temperature by one degree caused
reductions in total dry matter plant^-1 by 13 and 6% while increasing
minimum temperature over the optimum sowing temperature by one degree caused
reductions in total dry matter plant^-1 by 12.4 and 19.6%. The
reduction in minimum temperature by one degree in D2 (18 - 26 ^oC) caused reduction in seed yield ha^-1
by 10.3 and 9.6% per plant and per hectare, respectively. While the reduction
in maximum temperature by one degree in D2 (18 - 26 ^oC) caused reduction in seed yield ha^-1
by 6.9 and 6.3 % per plant and per hectare, respectively. Meanwhile, increasing
minimum and maximum temperatures by one degree in D4 (28 - 38 ^oC) caused reduction in seed yield ha^-1
by 10.2 and 9.8% per plant and per hectare, respectively. It could be concluded
from this study that heat regime is crucial for mungbean planting in Egypt.
Mungbean proved to be very sensitive to fluctuations in minimum and maximum
temperatures. The most favorable heat regime for mungbean production in Egypt is
heat regime of (22 - 32 ^oC).

Keywords

: Climate change, Mungbean, Minimum and maximum temperature

References

• Reference1 Dr Bakry Ahmad BakryReference 2 Dr mostafa Selim