Research On Matrix Selection In Smart Greenhouse When Using Decomposed Straw To Plant Canna Indica

Canna indica is colorful and varied in types,and it’s often seen in Subtropical and tropical areas.It’s comfortable with warmth and not tolerant to coldness.It can be planted nationwide after introduced in China.It’s rhizome can be used as medicine or to make cotton,and it’s leaves can be used to extract aromatic oil and also produce paper.In smart greenhouse,we can adjust its growing environment,therefore matrix choice is the key to its production in scale.Matrix choice is a real topic in related papers.Straw is the rest of crops after their fruits are harvested.After photosynthesis,the products and nutrients formed as well as trace elements are largely left in straws.In China,the dealing of straws is still problematic.If not dealt with in time,straws will do harm to the seeding of crops.The burning of straws is prohibited,because it will pollute the air and increase the respirable particulate matter.Concerning these two points,the paper chooses decomposed straw as matrix ingredients,uses straw in different proportions and raises canna indica in smart greenhouse.From the outlook,biological index and physical and chemical properties of matrix,we make comprehensive judgment and choose the matrix with the most suitable straw proportion to grow canna indica.Then we conduct comparison experiments using peat,coconut chop,distiller’s grains and cassava residue in same proportions,aiming to select the best matrix mixture.The results of experiments are as following:1.In smart greenhouse,we choose and select the best matrix mixture by using pastoral soil,decomposed straw and perlite to raise canna indica in different proportions.Different matrix have different physical and chemical properties,and different influences on the outlook and biological index of canna indica.The results of comprehensive judgement on experiment data are that:in the experiment to select the matrix composition,T3(pastoral soil:decomposed straw:perlite= 7:2:1),T5(pastoral soil:decomposed straw:perlite= 5:4:1),canna indica is of better growing condition.2.We choose and select the best matrix mixture by using decomposed straw,cassava residue,distiller’s grains,coconut chop,peat and perlite to raise canna indica in different proportions.Different matrix have different physical and chemical properties,and different influences on the outlook and biological index of canna indica.In this experiment,apart from using cassava residue as matrix ingredient,canna indica can normally grow and blooms with other ingredients.Comprehensively,D1(pastoral soil:decomposed straw:perlite= 7:2:1)achieves the best growing condition.Therefore,we should choose the reasonable matrix composition.The paper researches on the suitable matrix composition to grow canna indica using decomposed straw as matrix ingredient,and the influence of different matrix compositions on canna indica using different agricultural waste to replace decomposed straw.According to the experiment,in smart greenhouse,using decomposed straw as matrix ingredient T3(pastoral soil:decomposed straw:perlite= 7:2:1)is ideal to raise canna indica;using different matix to grow canna indica,D1(pastoral soil:decomposed straw:perlite= 7:2:1)performs the best,D3(pastoral soil:distiller’s grains:perlite= 7:2:1)take the second place.This experiment finds a new matrix ingredient to grow canna indica in greenhouse,and is important for production of scale as well as the matrix selection and growing of other Herbal flowers.At the same time,this experiment finds a renewable way to reuse straws and therefore avoid burning straws.According to research,this result has strong application value and guiding significance.