Effects Of KNO₃ Treatment On Germination Of Pepper Seeds Of Different Storage Time

Pepper is one of the most important vegetable species that man depends on for vegetable in the world. At present,it is a central issue of pepper seed physiology to study seed vigor.The seed ageing is sserious problem in the pepper industry. The ageing seeds induce vigor, and fall germination viablity. The seedings do not come out evenly. The germination percentage of these seeds is falling to a certain extent, but the vigor of these seeds is falling to a great extent. This causes farmer much economic loss.We should exactly test the seed vigor and timely know the condition of seed vigor. That guides us to product and use higher vigor seeds,helps us to exactly assess the qualitative rate and price of seeds that are selling,controls the seed vigor change to improve the storage condition. Seed vigor can describe the strongness of seeds from the essence and can forecast seedling growth in the field. Therefore studying the relationship between indoor seed vigor test and field test is very meaningful.The pepper seeds of different storage time were tested with different concentration of KNO3 and different soaking time at the same temperature,light and culture condition.The results were as follows:1. KNO₃ had certain promoting effect on the germination of pepper seeds.It's best osmotic factors were that osmotic concertration was 0.2%-0.3%, osmotic time was 12-14h. Under these conditions, KNO3 can promote germination percentage, germination viablity, and germination index of pepper seed.2. The longer storage seeds needed longer soaking time before it got to higher relative absorbing water.3. The electric conductivity and malondialdehyde content reduced.