Factors Affecting Growth of Pak Chong Napier Grass 1 Case Study, Agricultural Extension and Cooperatives Unit 4, Military Development Office, AFDC

Abstract

          This study was to analyze the factors affecting the growth of Napier Pakchong 1 of Agricultural Extension and Cooperatives Unit 4, Military Development Office, AFDC. The area is located in Tha Sae District and adjacent to Pathio District. by analyzing the factors affecting the growth of Napier Pakchong 1, both internal factors, namely genetic factors. and external factors are environmental factors.

          The study found that Internal factors of Pak Chong Napier grass 1 have been developed and improved species to have external characteristics with clear joints and joints. Fast-growing, tillering well, drought-tolerant, responds well to water and fertilizer. Adapts well in many soil conditions. external factors of the study area external factors on soil There is a soil series at 51C, which is Klong Teng soil series. With a slope level of 5-12 percent, soil maintenance is required to increase soil fertility to a weak acidity. Lime should be used for soil conditioning 0.5 ton/rai. External factors on nutrients. There is a very low to a very low amount. The amount of organic matter should be increased by using well-decomposed organic fertilizer at the ratio of 2,000-4,000 kg dry per rai. and apply chemical fertilizer 16-16-8 at a ratio of 20 kg per rai. and 2 weeks after stump dressing, fertilize at a ratio of 20 kg per rai. After trimming the stump for 1 month, add fertilizer 46-0-0 at a ratio of 10 kg per rai or 21-0-0 at a ratio of 20 kg per rai. The second time at the age of 2 months, the ratio of 20 kg per rai. external factors of water found that the amount of water in the soil was less because the area is steep and the soil is sandy clay that does not hold water as well as being affected by other factors that affect the amount of water in the soil such as evaporation of water in the soil and the use of water in the soil factors of light, temperature, and soil fertility when analyzing water sources The average annual rainfall of Chumphon province is 1678.2 mm. per year, although there is sufficient amount for growth. But when the rain is interrupted for a long time, the plants lack water, affecting their growth. increasing the size of cells causing plant growth to halt, resulting in stunted plants

          Managing internal and external factors for good productivity However, when internal factors can be controlled by choosing a good breed Therefore, it is important to focus on external factors. by improving soil fertility and improving the acidity - alkalinity Will affect the evaporation of water in the soil and the uptake of water to plants. The light and temperature factors did not directly affect the growth. but affects the evaporation of the water content in the soil which if the soil is improved to be fertile The evaporation of water in the soil is reduced. And there should be a supply of water only for growth.