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universidade federal da paraíba centro de ciências ... - CCA/UFPb

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15<br />

Matéria mineral, %<br />

14<br />

13<br />

12<br />

11<br />

sc<br />

cc<br />

10<br />

0 1000 2000 3000 4000 5000 6000 7000<br />

Densi<strong>da</strong><strong>de</strong> <strong>de</strong> plantio<br />

Figura 8. Matéria mineral <strong>da</strong> flor <strong>de</strong> se<strong>da</strong> aos 60 dias <strong>de</strong> rebrota em função <strong>da</strong>s <strong>de</strong>nsi<strong>da</strong><strong>de</strong>s<br />

<strong>de</strong> plantio 2.500 (2,0m x 2,0m); 3.333 (1,5m x 2,0m) e 6.666 (1,0m x 1,5m),<br />

plantas/ha nos dois sistemas <strong>de</strong> plantio, sem camalhão (SC) e com camalhão<br />

(CC).<br />

Fibra em <strong>de</strong>tergente neutro<br />

Para a variável fibra em <strong>de</strong>tergente neutro na flor <strong>de</strong> se<strong>da</strong> não foi verificado efeito<br />

(P>0,05) <strong>da</strong> <strong>de</strong>nsi<strong>da</strong><strong>de</strong> <strong>de</strong> plantio e do sistema <strong>de</strong> manejo do solo.<br />

O valor médio <strong>de</strong> fibra em <strong>de</strong>tergente neutro <strong>da</strong> flor <strong>de</strong> se<strong>da</strong> foi <strong>de</strong>: 43,43 % para o<br />

sistema <strong>de</strong> plantio sem camalhão nas <strong>de</strong>nsi<strong>da</strong><strong>de</strong>s <strong>de</strong> plantio <strong>de</strong> 2.500 (2,0m x 2,0m); 3.333<br />

(1,5m x 2,0m) e 6.666 (1,0m x 1,5m), plantas/ha respectivamente. No sistema <strong>de</strong> plantio<br />

com camalhão o valor médio na flor <strong>de</strong> se<strong>da</strong> foi <strong>de</strong> 40,91 %, para as mesmas <strong>de</strong>nsi<strong>da</strong><strong>de</strong>s <strong>de</strong><br />

plantio (Figura 9). Observa-se que os valores médios <strong>de</strong> fibra em <strong>de</strong>tergente neutro foram<br />

semelhantes para a <strong>de</strong>nsi<strong>da</strong><strong>de</strong> <strong>de</strong> plantio <strong>de</strong> 6.666 plantas/ha (1,0m x 1,5m), in<strong>de</strong>pen<strong>de</strong>nte<br />

do sistema <strong>de</strong> plantio utilizado. Nas <strong>de</strong>mais <strong>de</strong>nsi<strong>da</strong><strong>de</strong>s <strong>de</strong> plantio apesar <strong>de</strong> não ter havido<br />

efeito significativo, observa-se que a quanti<strong>da</strong><strong>de</strong> <strong>de</strong> FDN aumentou quando se utilizou o<br />

sistema <strong>de</strong> manejo do solo sem camalhão.<br />

64

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