| In order to achieve the efficient utilization of edible lentinus edodesresidue and manure resources,the studied has taken lentinus edodes residue and cow dung as test materials to prepare six types of compound nutrient substrates:100%lentinus edodesresidue(XN0);80%shiitake residue+20%cow dung(XN1);60%shiitake residue+20%cow dung(XN2);40%shiitake residue+60%cow dung(XN3);20%shiitake residue+80%cow dung(XN4);100%cow dung(NF).The effects of the six kinds of compound substrates on the bag-growing tomato in solar greenhouse were investigated,and the best formula was determined,so as to lay a solid foundation for the cultivation of vegetables in solar greenhouse.The specific analysis content includes:1.Plant growth.With the decreased proportion of lentinus edodes residue and the increased proportion of cow dung in the substrate,stem diameter,while XN0 treatment ranked second in the production,which was significantly higher than the other four samples,but there were no significant differences between XN1-treated and XN0-treated plants.The leaf area and number of leaves in XN1-treated samples were always the largest,and their root activity was the strongest,which was significantly higher than the other five samples,indicating that XN1 treatment in higher lentinus edodes residue had a promoting effect on plant growth.2.Plant photosynthetic capacity:The chlorophyll content of each treatment during the whole growth period is XN1>XN0>XN2>XN3>XN4>NF,The chlorophyll content of XN1-treatment was the highest.After XN1-treatment,the net photosynthetic rate was the fastest,and the specific value was 19.65mol/m~2·s.XN0-treated sampleswere the next,and XN0 and XN1-treatedsamples were significantly higher than the other four treatments,indicating that higher lentinus edodes residue could enhance the photosynthesis of tomatoes.3.Fruit yield and quality:With the decreased proportion of lentinus edodes residue and the increased proportion of cow dung in the substrate,the number of fruit set,average fruit weight and yield per plant of tomatoes firstly increased and then decreased,among which the XN-treated samples were the highest but not significantly different from XN0-treated ones.XN1 and XN0-treated samples are significantly higher than the other four treatments.In addition,the changes of solid soluble sugar,sugar to acid ratio and VC quality were obvious,suggesting that higher lentinus edodes residue would promote the increase of fruit yield.4.Physicochemical properties of substrates:With the decreased proportion of lentinus edodes residue and the increased proportion of cow dung in the substrate,the total porosity of the substrateshad not significantlychanged,but the bulk density and water-holding porosity of the substrates had increased while the ventilation porosity is reduced.The physical properties of other treatments are all within the appropriate range except for the NF-treatedwater-holding porosity.In terms of chemical properties,the p H value of the substrate decreased with lowered content of lentinus edodesresidue and all the p H values were greater than 8.The EC value steadilyincreased.5.Comprehensive analysis:Relevant analysis has shown that the p H value of substrate was significantly positively correlated with fruit yield,while the EC value and water holding porosity were significantly negatively correlated with fruit weight per plant and plant yield,which indicated that excessive cow dung would cause poor ventilation of substrates and increased salinity,which were not beneficial to plant growth and yield improvement.In general,the compound matrix formula with 80%lentinus edodes residue and 20%cow dung showed the best performance and was the best formula. |
PDF Full Text Request