| Through field experiment of flue-cured tobacco in zhunyi country in Guizhou province in 2003, the effect of Bio-organic fertilizer on the soil nutrition, the growth and development of flue-cured, N,P and K nutrition, the accumulation of nicotine and yield and quality of flue-cured tobacco was studied . The result showed:The contents of soil available N of bio-organic treatment was lower a little than the contrast after transplanted 35 days. After transplanted 50 days, the orders of that was T2>T3>T1>Ck( the signs of Ck,T1,T2,T3 standing for the treatment applied pure chemical fertilizer,the percentages of 25,50and 75 organic N of bio-organic fertilizer).As compared with the treatment of contrast,the contents of soil available N increased by 21.9%,20.7% and 12.1%,respectively. It was higher of the available P of the treatments applied bio-organic fertilizer than contrast during the whole growth ,especially applied the bio-organic of 50% organic after transplanting 50 days.The contents of soil available K of treatments was T1>Ck>T3>T2 after transplanting 35 days, then decliningg of Ck and T1 than stabilizing of T2 and T3. It was T2 >T3>T1>Ck which after transplanted 50 days.enhancing the percent 15.99%,13.08%,8.37%, respectively.The contents of soil organic was improved by using the bio-organic fertilizer, having obviously of the treatments of applied bio-organic fertilizer of 50% and 75% organic N after transplanted 50 days, increased by 14.97% and 14.32%. That can improve the soil pH a little. The treatment applied by bio-organic fertilizer of 50% organic N can improved the perimeter and height of stem and the number of leaf.When applied 75% organic N, it was disadvantage growth and development during 35-50 days and ripen. increased the dry material of root and the upland dry material of flue-cured tobacco, Treatments by applied bio-organic fertilizer can improve the accumulation of total dry material of flue-cured tobacco, increasing by applied organic N.The order of the accumulation N in root was T2>T1>T3>ck .increased by applied the organic N , it was improved the accumulation of N in stem and leaf and the total accumulation.The absorption velocity of N was greatly improved before 50 days after transplanted. The contents of N in leaf was increased when applied improvably organic N.Applied by the –organic fertilizer of 25% and 50% organic N, the contents of P of treatment of 25 and 50 percent organic N in root and leaf was higher than contrast at the former stage. The effect of applied 50 percent organic N of bio-organic fertilizer on the absorption velocity of P was improved than contrast before 50 days, declined by applied 75 % organic N. It was the highest of the total accumulation P by applied 25% organic N.It was advantage to the absorption of K by applied the bio-organic fertilizer. The order of the total accumulation K was T2>T1>T3>ck and improved in leaf with the organic N increased. The content of K is gradually declined during the growth and development. Utilized the bio-organic fertilizer, it was improved especially in leaf. With the velocity of absorb K rising, it reached the top on 50 days after transplant, and it was obviously heightened by applied the bio-organic at the times , and it was high a little at other timeIt was different that the step of nicotine accumulation than the N absorption. The velocity of absorb N reached the top on 50 days after transplant. The trend of nicotine accumulation was improved slowly before 50 days after transplant, then raised gradually, quickly enhanced after transplant 65 days, and reached the top at 80 days after transplanted. It is analogy that the treatment of bio-organic than contrast. That which increased the velocity before 65 days transplant. The order of total nicotine accumulation was T2 > T3> T1 >ck. It is influent the content of nicotine after topping. It is higher in root than in leaf and stem before that. When subtracted the top bud, it is higher in leaf than root and stem.With the leaf stage heightening, the leaf density...
|
PDF Full Text Request