| In the tobacco production, the measure of only using fertilizers in soil can not improve the quality of tobacco because soil nutrients releasing is not coincident with the nutrients absorb rules of tobacco, and the leaf fertilizer with low cost and high effect can harmonize the nutrients of tobacco leaf and improve the economic benefit of tobacco under assorting with soil fertilizer.Aim at the rules of nutrients absorbing during whole growth process of tobacco, we designed three different combined leaf fertilizer(A, B, C) and the using periods of these leaf fertilizer are juvenile phase, rapid growth phase and maturation phase respectively; and disgned leaf fertilizers (B], B2, B3, C1, C2, C3) with different consistency used in rapid growth phase and maturation phase. The aim was to find out the effect of these fertilizers to tobacco, and to search out the effect and function of different combinations and quantity ratio of leaf fertilizers in growth period and inner quality controlling of tobacco. We hope can provide the theory for development of leaf fertilizer of tobacco. The results of test are as follow:1. effect and mechanism discussing of tobacco leaf fertilizer using1.1 the basis of different types tobacco leaf fertilizer designingThe aim of tobacco planting is to reap with leaves, and there are three periods in tobacco growing process. In the juvenile phase, the total N in tobacco leaves is 23.72% higher than CK and the tobacco growth well; In rapid growth phase, the balance of nutrient is important, so the leaf area of B leaf fertilizer is increased 12.09% than CK and the increment of weight of single tobacco leaf is 13.18%, the effect of promoting tobacco growth is distinct. In the maturation phase, the results of spraying C leaf fertilizers were increasing first calss rate tobacco leaves 31.23% than CK and the highest increasing extend is 41.43%.1.2 phase of nutrient transferringThe period after cutting top of tobacco is very important to form the quality of tobacco with the characters of N metabolize is descended, the amylum is accumulated quickly, and this is the reason of C leaf fertilizer designing. The result of C fertilizer using is that the average of first class rate tobacco increased 31.32%, the average price increased 18.24%, the chemical components are all in the range of tobacco with good quality, the smoking quality of top and middle tobacco leavesincreased 4.99% in which the top leaves increased 2.59% and the quality of top leaves is close to the quality of middle tobacco leaves.1.3 the occasion and short-term effect to tobacco leaves nutrientThe reasonable using of leaf fertilizers must fit for the using occasion and shor-term effect. The results of test showed that there was no effect after using A leaf fertilizer, the effect of using B leaf fertilizer was obvious and C leaf fertilizer only effected coordinating chemical component of tobacco leaves. These results showed that the occasion and short-term effect of tobacco.2.the effect to leaf fertilizer to tobacco growthing2.1 the effect to tobacco leavesThe results after using leaf fertilizer showed that the effect to leaf growth was obvious. Compared with CK, the changing extent of biggest leaf area was -22.82%~23.72% and the biggest leaf area of C1, C2and C3 were lower 5.1%, 10.13% and 22.82% than controlled treatment in 10d after cutting top. The results showed that providing the inorganic nutrients in the wrong time, we can not prmote the growth of tobacco leaves and even restrain the growth of leaf fertilizer.2.2 the effect to flue-cured tobacco economic indexOutput value: in this test, the promoting effect of leaf fetilizer was significant and most significant. The increasing extent of output value average of leaf fertilizer was 40.33%. But the incremental result of this test should be proved by the test in the future.Average price: the average price of C leaf ferlitizer was 18.24% and the increment was more significant. The reason maybe was that transferring N metabolize to C metaboli...
|
PDF Full Text Request