| Rice growing areas in the Lower North of Thailand has been severely affected by extreme climate change seen as cold injury in 2007 dry season. The total affected area was 621,176 rai (99,388 ha) resulted in a drastic loss of 2,749 million Baht ($US 89 million). Since it has been reported that the most sensitive stage to cool temperature is the young microspore stage, approximately 8.5-10 days before flowering, and the critical range of temperature for cold injury resulted in panicle sterility is 15-20 oC. This preliminary investigation firstly aimed to observe visible changes after exposing to cool temperatures. Secondly, to observe the relationship between low temperature and sterility. Thirdly, to measure a subsequent reduction in grain yield of rice cv.... |
