Effect Of Different Growth Regulation On The Ability Of Resistant To Lodging,Yield And Quality Of Maize

Maize plays an important role of grain and forage, in recent years, the demand for corn is rising year by year in our country. In cultivation, increasing planting density is the main way to increase yield, at the same time, Lodging become to the biggest obstacle to corn high and stable yield. Effects of spraying 6 kinds of plant growth regulators,(Puaite, Yuxi, Yixili, Aizhuangsu, Yumibanlv, Shuidaoxiaopangdun, they are short for, respectively: P, X, Y, A, B, S), on a resistance to lodging, yield and quality of corn,(Nonghe518, Meiyu5, Huayu12, them are short for, respectively: N, M, H) were studied.These plant growth regulators which were divided into tranditional(Y、A、X) and a new type(P、B、S) of regulators. The results showed as below:(1) According to the study of effects on stem-lodging resistance after spraying growth regulator, we know that:three kinds of maize were sprayed X, Y, B, plant height, ear height, and the coefficient of ear height of them were decreased, and these have significantly difference with CK; however compare with CK, maize of sprayed P, A, S are have not reduce to appear significantly difference.Determination of pushing force of hinder,the ripening stage of force is greater than the flowering stage of force, There are positively correlated with the two force and stem diameter of 40 cm higher than the groun, broken stem strength and stem diameter of the first internode below the ear.The length of basal internodes 3-6 section of maize(M, H) that were sprayed X, Y, B, are far short than CK, and the diameter of basal internodes 3-6 section is thick than CK; the diameter of basal internodes 3-6 sectionthe of maize(N) which were sprayed Y, was better than CK, and All the above indicators have a significantly difference with CK. Aerial root, except maize(H) which was sprayed P, X, crude fiber and ash content of them is far more than CK. Especially, the performance of maize were sprayed X, Y, B.(2) According to the study of effects on Richards after spraying growth regulator, we know that:After maize were sprayed growth regulators, chlorophyll content presents a trend that first and decreased afterwards, and with the extension of administer period the difference between all treatments and CK are decreasing. There is a similar regular on the performance of 3 varietres maize.Before the harvest a week, chlorophyll content of maize(N) sprayed Y, B are lower than CK, there is a significant difference with CK.the performance of maize(H) sprayed P, S are oppose to Y. After three kinds of corn maize were sprayed growth regulators, their chlorophyll content has slightly difference, but the present overall trend are very similar. Three leaves near the corn cob, the sum of their area have increase in certain degree, except P, the rest of treatments have no significant difference with CK.All varieties maize were sprayed 6 kinds of plant growth regulators, the performance of maize very similar. The effect of P, S are better than CK, they showed improve termination of increment and hundred-grain weight of increment. Y and B have opposite performances on these.(3) According to the study of effects on yield and quality after spraying growth regulator, we know that:After maize were sprayed X, their performances are significantly better than CK, about indicators of the ear length, length of bare tip, circumference of ear, line grain number and ear grain number; then performances of above indicators are contrary to maize of were sprayed Y and B.Except X on M, others’ thousand kernel weight are heavier than CK; similar trend was presented on the weight of each ear kernel and yield. Yield were increased about maize(N) that were sprayed P, A and S, there are significant difference between them and CK; Y and B treatments’ yield was significantly lower than CK. P on H and S on M, yield were increased.Y treatments on M, the corn starch contents was significantly lower than CK. Except this, there were no significantly difference in the others treatments of corn starch contents with CK. Protein, lisine content of maize have no difference in all treatments with CK.