Rational Application of Free gossypol content in Cotton meal in Livestock and Poultry Feed

Hope to be able to provide help to colleagues! Attachments: you need to log in to download or view attachments. No account number? Registration-free gossypol can be used rationally. Take a look. -- take a look and thank the landlord for taking a rest. This kind of outdated article should not be introduced. -existence is reasonable. 6 @ (f'p 7 w 67 a) is just that we didn't use it well.-- the content of free gossypol in cottonseed meal is on livestock and poultry feed. U / j-x6 v% s # R#] + _ 7Q rational use of 3G / y "~ 9eT7y* x: @ 0r* uqi * Shihezi Animal Husbandry and Veterinary Workstation (832000) Feng Jianli Xu Ye 1? P / D. W$ X P & a1z3u (* Y Shihezi Reclamation area is a large cotton producing area, and its by-product cottonseed meal 7n2w7a & J% v is the best source of plant protein feed in livestock and poultry formula feed. (v. c "Q, h! B 4 BkJ9 v contains more than 40% protein, lysine 1.59%, methionine "m $, f! X & e. H 6 Y 8 n" n, H'X 0. 52%. Cottonseed meal is the remaining by-product of cottonseed hulled, heated and flattened into thin flakes * g "t: L# O9o -] 7Q after hexane extraction of oil with solvent. in terms of']% L" g6R8 {v; J5A; H, cottonseed meal is very valuable animal feed in our region. A kind of raw material. To identify the quality of cottonseed meal, we usually judge f 2Y8 `"b% V: h% K7" by crude protein and free gossypol content. Break. The crude protein content of most of the cottonseed meal samples from the reclamation area monitored and analyzed by me in recent years is between 40%-44%, while the content of free gossypol in% B'r: Z4b / W7d9i is quite different. The following is to analyze its theoretical application in livestock and poultry according to the $T /; R0z'pM9 UM/'x cottonseed meal samples submitted for inspection in our district, so as to discuss the maximum utilization rate in practical application in one step.) W + ^ 9 E3 u0 Y6 |: [$S; E1 Materials and methods, x + O / m3 x6 `"X2 T V!] t, ^-K, L test samples: cottonseed meal samples were provided by municipal processing plant, 149 group feed 3s / I 1? 5v "L feed plant, 122 regiment feed factory, 129 regiment feed factory, Tiankang feed'{# Y% U8l' Z. P (M* m * @ 9A factory, Longyuan Dairy Factory, Liuwang feed factory). 6 C: X2T / L9 [! A9 @;] 9a35 samples. In order to reduce the random error, each unit waits for 4 V / Y "] & ~ (e7 h!) I five samples of cotton meal were collected. H9 z: F8 X9 v1 O2y monitoring method: crude protein content was determined by GB/ T6432-$M + d $s! The content of crude protein was determined by M8n5m1a + v94 method, and the content of free gossypol was determined by + f, o {). The content of free gossypol was determined by pI& ~ 4 BGB13086-91 method.) C-V "E4 zx& y! X! E0 ^ 2 result analysis, O) j, [1 f'V, V.? From the measurement results, we can know that the higher the free gossypol content is, the lower the protein content of the cottonseed meal is, that is, the crude protein content is lower than-[$9L, w% A5GT9`, and the utilization in livestock and poultry is also lower. The addition of cottonseed meal is relatively large in the mixture of 0N76s% m # q2U & f and growing chicken, and it is in the middle of fattening: b7I & t7X. T. S*} 3Q + d5W8n6C pig compound, which should be added carefully in the mixture of laying hens. J: h)] $U'Q0b plus. ! V6h0 #]-P' {7i* X0 kp4 _ test found that the poor quality of cottonseed meal is not extracted, the high temperature heating in the process of frying (? 0 | 6 X "_% L8 g oil is not sufficient, and incomplete shelling results in cottonseed meal * r + U +?! B) the quality of N, i' is poor. As a result, the content of free gossypol exceeds the national ban of% | (~ 9 J* M# j8 Q8 Q value (i.e. ≥ 1200mg/ kg). 3U4B2 ~ (J0z "z! L B4 analysis and discussion, | 5Q. N "J1o# z# e + 8 FV (1) according to the national standard GB13078-91, 3c + n-@ & h / e, x.u3N% [toxin free gossypol content in feed is applicable to: fattening pig compound feed 35 k-y9 Y6 c'k ≤ 60mg/ kg, laying hen feed ≤ 20mg/ kg, broiler, raw 5V'b + t6A4l4H* K compound feed ≤ 100mg/ kg. Therefore, we know that the content of free gossypol in cotton meal: O (W0f* X6y7? # b, V, B) is different, and there is also 5G8E3n3F in livestock and poultry. _, L1 | 0D$ N# U fundamental difference. 4 y (A8kK8D; H "D (I (2) cottonseed meal is the best source of plant protein, but its 2C% c8 | 8G" P7M4 | 1F / N) L in practical use, should be based on the safety of free gossypol to make # r-h9 E /}! O) u% {1 ~ 6q8 N dosage shall prevail, and it is best to be used in the feed of fattening pigs, broilers and "Q (k: J / l) (~ # U growing hens and laying hens.) `4b & f5L, [9W. _, E (3) without detoxification, the lowest free gossypol content of cottonseed meal is 411. 9mg/ kg, maximum / C $| $y8 M, r 1o 6 l.] 0 p} + t up to 1445. 4 mg/ kg, so it is necessary to distinguish between / V! V * o * k 7 e 5 T + S. f to wait. We theoretically believe that for every 100 kg feed, 1. 38-1. 85% should be added to # S) I: e 0 X + V; @ 6 o3 t laying hens, and 6. 92-24% should be added to broilers; j "t / p $b'z $m $d chickens and growing hens. 27% is suitable, and 4.2%-14.6% should be added to 7 w 0 N * I, B 2z finishing pigs. & F! B. V 3 G: T8 u (K (4) cottonseed meal formula feed must be combined with-RS/ O9 R'|: W% u gossypol content value in practical application, so it is necessary to do a good job of cottonseed meal detoxification! P'} 0Km,?): s is very important. There are two methods for detoxification of cottonseed meal. The first one is in 7 _ + K7d / EE' N$ p "I, r!? When feeding livestock and poultry, ferrous sulfate is mixed in the feed. The principle is that you-w0 ^ $R + G3C0e: 10w, f-gossypol combines with iron ion and loses its toxicity. The safety can be achieved if the amount of iron added is exactly equal to that of gossypol. Or steam 3i, C + M% {$s & {heating for 20 minutes to change the free gossypol in the cottonseed meal into bound cotton 9z (H% P) {9 @ phenol to reduce its toxicity. Some data show that after detoxification, the free gossypol content of 6 Q "o'L# b, e) V-G can be reduced to 125mg/ kg, and that 8 t. W + w: @ / s 0K # S can add 46% cotton meal to broilers, 15% cotton meal can be added to laying hens, and 36% cotton meal can be added to @ 1 p (R; C7m / E$ Ss + X! P fat pigs). Therefore, reasonable application of cotton meal can add" Z! `9E. R4d! " B to the role of cost savings, of course, with soybean meal reasonable application of 5 u. X, `# x! I-p. T3 [the effect will be better. / h: R7 {5X: P, o8H1b, [553H3b) v; I9 $b + x) [$} No. 5 of 2002) F (`r, E5R+ n) F (5) when cottonseed meal is used as the main protein feed, it should be 6 wQ. B. A4 `0 [3 Y] should not exceed 35%. The reason is that the proportion of cottonseed meal is too high, O8R6r6o (@ 5W3G; p4 ^) is large, the content of crude fiber in cottonseed meal will affect the digestion and absorption of livestock and poultry, and the palatability is poor at 5z, W7t7b9 T2 J. ; x. 1% V / P) C'^ (6) the average content of crude protein in cotton meal is 40. 5%. 26%, although-N; j) f / @ # ~ & c2s0D is similar to the crude protein in soybean meal, it is necessary to supplement amino acids due to the action of crude fiber. The cottonseed meal detoxified at the same time (free 2B: NS#}! {* S ([& N't) I / o% V gossypol < 125mg/ kg) is not only rich in protein, but also rich in B vitamin digestive enzymes, amino acids and minerals 8K (A1 a / G4e "S7 O5 E9b). Therefore, in order to maximize the use of cottonseed meal in production. Should / V9? 9 R1 C3 X5? (o: l & k / B do a good job of detoxification. # c8 J7 R: @; Q +? M "}% I5 conclusion (@" Wo1 ~ 3M & F cottonseed meal must be used safely in livestock and poultry. D 0 Z 0 p; F'~-Q. H, g * Q4X free gossypol content value, so it must be purchased from the regular', B # g "M)% t" z large-scale processing plant, and at the same time, the free gossypol toxin content must be determined by the corresponding monitoring mechanism (T (v7N$ I); v). Due to the low price of cottonseed meal, O6b6Z! The quality and quantity of cottonseed meal should be guaranteed when using cottonseed meal formula feed in o &} / p8C dosage, otherwise the trouble will be endless. Therefore, making full use of cottonseed meal in our reclamation area can not only improve the comprehensive utilization rate of F 1E / w 2X: G 1Z 5 O, but also save feed cost and improve the economic benefit of raising 27 S. U-^ (e, b-g). From the measurement results, we can know that the higher the free gossypol content is, the lower the cottonseed meal protein content is, that is, the higher the crude protein content is. O "N4K5 {. S8F% @ 7H"] u9 G. O3? / an is low, and its utilization in livestock and poultry is correspondingly low. In broiler 8 f7 ^! D # {# x; I # G; e $Y-R8 U + L: l and growing chicken feed containing relatively large amount of cottonseed meal, fattening x5f) T; D9P3s (K. A3 ^ [9 O3 |. V pig ingredients are in the middle, laying hens should be carefully added. Z.] * z + V5 S (R9 `* u + Z / 7 j6 N7 j; S0] 4 s! R4H plus. 4 c3]: H! H% R'G* P-L0 @; pMurt-the title is very novel, see if it is useful-the protein in Shandong area is at 40%, what is the estimated range of free gossypol? I don't know how cottonseed meal works on livestock and poultry. Our company only uses less for cattle, pigs and poultry! Hubei cottonseed meal generally contains 42% free gossypol! How much should be added to the pig feed? How much is the appropriate amount of cotton cake produced during the pressing process? An outdated article should not be introduced.