Effects of climatic factors on thousand kernel weight of highland barley

Using the principles of statistics and analysis method，effects of climatic factors on thousand kernel weight in main development stage of highland barley in Tibet are analysed．The thousand kernel weight-climate model of highland barley is performed．The results from tests show that，from the floweriag to milking stages，ahout 18．2℃ for mean temperature and more radiation are favor of improving thousand kernel weight．but high temperature and partly raining or cold and rainy weather cause thousand kernel weight to be decreased.