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《Acta Agriculturae Nucleatae Sinica》 1984-04
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THE RELATIONSHIP BETWEEN THE HEIGHT OF THE FIRST CROP RICE STUBBLE AND THE ~(32)p UTILIZATION AND ECONOMIC CHARACTERS OF RATOONING RICE

Sun Xiao-hui Tian Yan-hua Yang Huo-lun Zhang Zhong-liang Wang Hua-xin Ren Guang-zao Zhang Ming-rong(Sichuan Agricultural College)  
The relationship between the height of first crop rice stubble of an early variety"Shufeng No.1"(O.stiva subsp.hsien Ting) and the ab- sorption,distribution of ~(32)p and the grain yield of ratooning rice was studied.The result indicated that the taller the first crop rice stubbles, the greater the absorption of ~(32)p and the higher the yield of the ratooning rice,The dry weight and radioactivity of the ratooning rice on the third node were maximum in the treatment in which the first (uppermost) and second nodes were kept.The dry weight and radioactivity of the ratooning rice on the fourth node were maximum when the third and fourth nodes were kept.So far as emergence,the number of panicles and other economic characters of ratooning rice were concerned,the ratooning rice on the third node was the best as compared with those on other nodes.
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