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6、R.0JjJijf ;1Jrl#:l:7. 5kg. #a1j;ifijtiif!mt:l: iJf!:I:#:I:, 1l*:I:7fMHi 225kg/hm 2 bJE;m:I!.iJEH#:l:jf;1Jll10%15%.0 5. 6. 3 fItt* 1Tir!. :o -PNffir!:;t; 15em-20em, 3em-5em, -3ftHIi.#1f .,*ffl.M.#!$J?3AAa1.ffi, mfI, S*S 5. 8 ffiJI :tE.7fMjIg,lfttiffi,d:tEftAAMmm2,mtiffi*. 45kg/hm 2 -75kg/hm 2 t!t-=.,. M/J,t;a1a11& 1&.mlita1,f.f&1?*:I:la1, .A.o 3