多元多熟种植制度复种指数计算方法探讨.PDFVIP

J our nal of N anj ing A g r ic ult ural Un iv ersity * 卞新民　冯金侠 (, 210095) 90 , , , ; ; ; 344.3 S Method of calculating cropping system index of diversified multiple cropping systems Bian Xinmin and Feng Jinxia (Dept of gronomy, Nanjing gric Univ, Nanjing 210095) 1990 , , ABSTRACT In accordance with the new characteristics of the cropping system in s the significance of intercropping relay cropping multiple cropping and cropping index was analyzed in this paper T he standard of distinguishing intercrop-, . ping from relay cropping which includes crop intergrowth period crop maturing time crop harvest time and coefficient, , , , was discussed. Finally, some rules and a method of calculating cropping index of diversified multiple cropping systems were proposed. Key wordsfarming system; cropping system; cropping index; multiple cropping , () , : = ( / ) 100% , , [ 1] , , , , , 1　复种的本质 , ( ) : () , ; , , ; , : ( 1) ( ) ; (2) () ; (3) () , , * ( 95 02-01-10) (BE96314-1) : 1998-05-15 12 22 , 2　套作与间作的判别标准 , , (800 d) () , (, ) , , [2, 3] , , , , , ( ) ; , , () , , () , 40% (1) , () , , 3 , 6075 ( 60%) , 6 750 d 2 9 000 kg/ hm , , ( ) 1/ 3 , 1/ 3 1 Table 1 rowing period of major crops d ( 1) ( 2) ( 1) (2) Growing Yield forming (2)/ ( 1) Gr