EFFECTS OF APPLYING CRYSTAL ORGANIC FERTILIZER IN THE TOBACCO PRODUCTION AND ITS DYNAMICAL RELEASE IN THE SOIL

Liu Yixin 1) Han Yiwang 1) Jiang Yuping 1) Yu Lisha 1) Liu Wuding 2) ( 1) Hefei Institute of Economics and Technology, Hefei 230052; 2) Huazhong Agricultural University, Wuhan 430070)

crystal organic fertilizer, tobacco, nutrient releasing dynamics

The effect of crystal organic fertilizer and specific compound fertilizer in the tobacco production was conducted including the soil microbiologic number, volatilization of NH\-3 and available nutrient releasing dynamics. Pot and field experiment results showed that there wasn't “salt efflorescence” on the soil face of the organic fertilizer treatment but “salt efflorescence” was very obvious on the soil face of the compound fertilizer treatment. During applying fertilizer 1～20 days, the volatilization of NH\-3 reduced 0.70～0.86 mg/d·pot. Field experiment results showed that compared with compound fertilizer (10?6?21, specially used for tobacco), organic fertilizer could increase soil microbiologic number and last more than one month long. Available nutrient releasing fitted with the absorbing character of tobacco vegetative stage. After tobacco transplanted 30 days (meaning 30 days after applying fertilizer) the organic fertilizer could increase the consistency of chlorophyll, NO\-3?N and photosynthetic intensity in the fresh leaves and strengthen the oxidizing force of tobacco roots. Compared with compound fertilizer (N75.0 kg/hm\+2), the organic fertilizer (N75.0 kg/hm\+2) increased tobacco leaf yield by 17.93%(1996)～20.26%(1997) and yield value by 2?844.5 yuan per hectare(1996)～4?478.8 yuan per hectare(1997). Because the loss of fertilizer was reduced, the level of fertilizer supply could be sharply dropped. The organic fertilizer (52.5 kg/hm\+2) still increased yield by 9.9 %(1996)～14.38%(1997), and yield value by 1?740.6 yuan per hectare(1996)～3?390.5 yuan per hectare(1997). Compared net N 30.0 kg/hm\+2 of organic fertilizer with net N 75.0 kg/hm\+2 of the compound fertilizer, tobacco leaf yield has not been dropped but yield value can be increased 1?741.7 yuan per hectare(1997). The crystal organic fertilizer has significant effect on the increase of tobacco leaf yield and the improvement of raw tobacco leaf quality.\;