Study On Fertilization Amount For Banana Summer Squash In Eco-organic Soilless Culture

The experiment, in which the two times saturated-D optimal design was adopted, involving 3 factors, each with 5 levels, were conducted to study the fertilization amount for banana summer squash in Eco-organic type soilless culture system. With the aid of computer,the model demonstrating the relationship between yield factor and three element factors(N,P,K)were established. The model is as follows: Y= 543.7581＋22.3308X1＋7.9281X2＋69.5503X3＋20.8152X1X2＋27.3437X1X3＋65.6910X2X3－103.5530X12＋8.6026X22－99.2235X32Analysis result indicated that: Firstly, the effects of three factors on the yield of cucumber increased by degrees in series of K,N,P. Secondly, the interaction among three factor existed. The interaction between N and K,N and P,P and K were significant. Theinteraction effect between P and K is greater than that of N and K and N and P. Thirdly,by simulating with computer, to achieve the yield of 615.7565Kg/acre.the optimum amount of N,P and K were 16.9858kg,14kg and 29.3335kg respectively during growing stage.After analysis of chicken manure showed that: It's release rate is stabilizable during different stage, the quick acting N,P and K release rate are about 230mg/kg,1.3g/kg and4.4g/kg respectively during different stage.In this experiment, the mean absorption of N was 10.2g/plant, the absorption during vegetative growth stage and reproductive growth stage were 1.2g/plant,9g/plant respectively; the mean absorption of P was 3.2 g/plant, the absorption during vegetative growth stage and reproductive growth stage were 0.5g/plant,2.7g/plant respectively; the mean absorption of K was 7.8 g/plant, the absorption during vegetative growth stage and reproductive growth stage were 0.9g/plant,6.9g/plant respectively.After calculation, the reasonable fertilization regime would be as follow:Base fertilizer: mature chicken manure 10kg/m3, vermiculite compound fertilizer 0.5kg/m3.Additional fertilizer: vermiculite compound fertilizer 10g/plant, 20 days after planting; hereafter, Applying fertilizer every 10 days, vermiculite compound fertilizer 10g/plant or chicken manure 25g/plant,fertilize them alternatively (it can offer total N,P and K 1g, 0.85g and 0.4g respectively)...