No matter how good the cotton varieties are, if they are not supported by good methods, premature aging and related problems will inevitably occur. The so-called premature senility, generally refers to cotton in the flowering period, in the effective growth period, fertility organs weakened or stagnated reproductive life function, especially in the genital area performance is more obvious. Premature aging time occurs in late August to early September. The premature decay of cotton in 2004 has several distinctive features: premature decay time is revealed early, and some cotton fields have been outcropping in late July and late August. The farmers call it premature aging; the area of ​​premature aging is large regardless of hills or plains. Cotton occurs; there is a large proportion of early-onset premature cotton. Premature aging has severely affected the growth and yield of cotton. Lighter crops have reduced production by 20% to 30% and heavy production has been reduced by more than 50%. Symptoms of premature aging, the leaves first generally yellow, and then gradually browning and withering, no need to fight the old leaves automatically fall off; the proportion of red stems more than 90%, the growing point becomes sharp, the centripetal movement stagnant; flower position moves up, the top flower buds lurking , No longer extend the new fruit branches, fruit layer less than the number of layers 2 to 4 layers; root failure, root shallow shallow, greatly reducing the ability to absorb fertilizer and water; peach small, low clothing, quality deterioration, poor seed maturity. From the investigation and analysis, the reasons for premature aging are mainly due to the fact that the ecological conditions did not meet the needs of normal growth and development of cotton, and cotton field management measures were not put in place. Specific performances include the following points: Since late June, drought has been linked to autumn drought, drought time is rare in previous years, and rainfall is about half less than in the same period of the calendar year; high-temperature duration is long, especially in early September, when the temperature climbs up to about 35°C again, The birth of cotton is extremely harmful to fertility. A considerable number of cotton fields with more peaches are used for leaf litter in this period. The volatilization of cotton in soils with weak soil layers is insufficient and autumn peaches are not covered. Cotton fields with nitrogenous fertilizer or nitrogen and phosphorus are applied. Because of the lack of potassium, withered withered; flower bell fertilizer, peach fertilizer investment is insufficient or not applied, cotton itself lacks stamina. Especially in early-onset cotton fields, because sitting peach earlier, heavier load, more prone to premature aging; without irrigation or drought is not timely, it is difficult to play the role of water fertilizer, resulting in a great waste of light and heat resources. Through the analysis of the reasons for the enduring decay of cotton in 2004, we should learn some inspiration from guiding cotton production in 2005: First, we must further strengthen the matching of cotton field water facilities and improve the functions of irrigation, drainage, and irrigation so as to ensure the normality of cotton. Fertility to create high standards of water conservancy conditions; the second is to improve the cotton field soil, especially to increase the organic fertilizer, to improve the ability to maintain water and fertilizer; the third is to balance the fertilization, increase the application of phosphorus and potassium and boron and other trace elements, to avoid physiological Withered premature aging, such as multi-application of Australian liquid fertilizer can be very good to avoid premature aging; Fourth, to increase the amount of fertilizer, especially flower bell and peach fertilizer; Fifth, in the birth process of cotton, always pay attention to protect the roots, To promote root growth and extend the functional period of water supply and fertilizer in the root system, Australian liquid fertilizer has a unique role in this regard, and everyone may wish to try it.

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