STUDY ON THE PHOTOSYNTHETIC MIDDAYNAP OF CROPS AND ITS BIOTIC POTENTIAL OF YIELD

doi:10.7668/hbnxb.1986.04.008

Abstract

Abstract: In the study on the net photosynthetic change at whole day of nine kinds of crop. It was found that the netphotosynthetic change at whole day of some crops such as wheat, coconut and banana appear as severe types middaynap,and its decrease of yield of biotic potential was 73.3%, 38.8% and 36.5% respectively. At other crops such as Italian millet, potato, rice and rubber tree ( Hevea brasiliensis) appear as bimodal types middaynap, and its decrease of biotic potential was 29.5%, 30.2%, 29.6% and 51.0% respectively. But the middaynap at the sugarcane and bamboo was not found.It was suggested that if the net photosynthetic middaynap was subdued, the yeild would be increasing notably.

Key words: crop, photosynthesis, middaynap

Han Fengshan, Zhao Ming, Zhao Songshan, Wang Meiyun, Zheng yansu, Li Guoqin. STUDY ON THE PHOTOSYNTHETIC MIDDAYNAP OF CROPS AND ITS BIOTIC POTENTIAL OF YIELD[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1986, 1(4): 49-53. doi: 10.7668/hbnxb.1986.04.008.

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