Discuss About Of Cultivation Technique Questions With Plastic Film During The Extention In JiLin Province.

In this essay, the author applied field fandom group experiment and carried out researches on the growth characteristic and output of corn under different cultivation methods and different densities As the result has shown, there is great difference among plastic film cultivation, normal cultivation and different densities.The corn strain in the experiment is anti-density Simi 25. As the result shows, different treatment can influence the growth process of corn greatly. Under the same seeding period, plastic film cultivation car reduce the growth days of corn, Speeder the growth process and avoid the possible frost harm that may occur because of the long growth period of late ripe strains.Under different cultivation methods and densities, there is no obvious difference of the plant height, yet plants of plastic film cultivation can be taller than normal ones, average about 1% taller. There is obvious difference of plant thickness; plants of plastic film cultivation can be about 5% thicker than normal ones. Different cultivation methods and eDensity can influence the corn leaf area index greatly, using plastic film at early period, the leaf area index often increases rapidly, while using plastic film at latter period the leaf area index is the same as normal cultivation, which shows plastic film cultivation can increase leaf area index.For earth temperature and water content of soil, plastic film cultivation can improve earth temperature and effectively keep the water content of soil .With heavy rain water content doesn't increase too much, while with little rain, plastic film can hold the water content of soil.Plastic film cultivation can also influence the weight content of soil greatly .After using plastic film, the weight content is about 0.1g/cm~3. And there is high whole degree in plastic film cultivation, average about 55%, while without plastic film, it is 50%, all of the above shows that in plastic film cultivation, weight content of earth drops and hole degree increases, while in normal cultivation, weight content of earth is high and hole degree is low, which makes the soil not loose enough...