Appearance and Quality of Zheli No. 6 Pears Affected by Bagging
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摘要:
目的 研究不同套袋处理对浙梨6号果实外观和内在品质性状的影响,为改善浙梨6号综合品质、提升果品价值提供参考。 方法 以浙梨6号为试材,设置不同果袋、不同套袋方式和不同时期套袋处理,以果实不套袋为对照,测定成熟期果实的外观和内在品质的变化情况。 结果 不同果袋处理果面亮度均显著高于对照(P < 0.05);套白色单层大袋果实果锈指数显著低于对照(P < 0.05),可溶性固形物、可溶性总糖含量和甜度值与对照无显著差异。二次套袋果实果锈指数显著低于对照和一次套袋,可溶性固形物、可溶性总糖、可滴定酸和维生素C(Vitamin C, VC)含量与对照无显著差异,果糖、葡萄糖含量和甜度值显著高于对照和一次套袋(P < 0.05)。盛花后10、20、30 d套袋,黄绿果较多(≥50%),果锈指数较低(0.471~0.600),果点直径和密度显著低于对照,而盛花后60 d套袋,全锈果较多(72.5%);除盛花后10 d处理外,各时期套袋果实可溶性固形物、可溶性总糖、可滴定酸和VC含量均与对照无显著差异。 结论 套白色单层大袋对浙梨6号果实外观品质改善效果显著,同时采用“白色小蜡袋+白色单层大袋”的二次套袋方式,盛花后10~30 d为生产黄绿色果品的防锈套袋适宜期,盛花后60 d为生产全锈褐皮果品的不防锈套袋适宜期,套袋对果实内在品质无显著负面影响。 Abstract:Objective Improvements on the appearance and fruit quality of Zheli No. 6 pear by bagging were studied. Method Zheli No. 6 pear s on the trees were covered once or twice with a variety of pouches at different times of the fruit development in a field experiment. Appearance and eating quality of the mature pears were monitored. Result The bagged fruits were significantly brighter and more shiny than the counterparts without covering (P<0.05). The pears matured in the white single-layer large pouches had significantly lower fruit rust index (FRI) than control (P<0.05) but no significant differences on the contents of soluble solids, total soluble sugar, and sweetness. Those being bagged twice were significantly lower on FRI than control or those being bagged only once. Nor did they differ significantly from control on the contents of soluble solids, total soluble sugar, titratable acid, and VC, but contained significantly more fructose and glucose than control or those were bagged a single time (P<0.05). When the bagging was held 10d, 20d, and 30d after full bloom, equal to or more than half of the resulting fruits were yellowish green with few rusty streaks and spots having an FRI of 0.471-0.600 and low on latitudinal measurements and flesh density. Bagging 60d after full bloom produced 72.5% of the fruits with fully rusty-appearing peels. And, except for those bagged 10d after full bloom, no bagged pears significantly differed from control on the contents of soluble solids, total soluble sugar, titratable acid, and VC. Conclusion Bagging Zheli No. 6 pears on the tree with the white single-layer large pouches significantly affected the appearance of the matured fruits. Using the white small wax pouch in 10-30d after full bloom followed by the white single-layer large pouch for the bagging fostered bearing of yellowish green fruits. Whereas the non-rust-proof pouches for bagging once in 60d after full bloom encouraged formation of a fully rust, brown peel. Meanwhile, the appealing eating quality of Zheli No. 6 pears would basically be intact under the bagging treatments. -
Key words:
- Pear /
- Zheli No. 6 /
- bagging /
- fruit quality
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图 1 不同果袋、套袋方式浙梨6号成熟果实外观
A:不套袋果实(CK);B:白色单层大袋果实;C:黄色单层袋果实;D:外黄内白双层袋果实;E:外黄内黑双层袋果实;F:二次套袋果实。
Figure 1. Mature Zheli No. 6 pears bagged in different pouches once or twice
A: bare fruit(CK) ;B: fruit bagged in white single-layer large pouch;C: fruit bagged in yellow single-layer pouch;D: fruit bagged in outer-yellow-inner-white double-layer pouch;E: fruit bagged in outer-yellow-inner-black double-layer pouch;F: fruit bagged twice.
表 1 不同果袋处理浙梨6号果实的外观品质
Table 1. Appearance of Zheli No. 6 pears bagged in different pouches
处理
TreatmentL a b 果皮色泽
Fruit peel
color果点
Dot果面光滑度
Degree of
fruit skin
smoothness果锈指数
Fruit rust
index果锈位置
Rust location单果质量
Weight per
fruit/g果形指数
Fruit shape
index萼端
Calyx end/%全果
Whole fruit/%Ⅰ 63.42bc −6.29c 36.23a 黄绿 小、密 光滑 0.743b 55 45 820.55a 0.89a Ⅱ 62.06c −6.44c 36.55a 黄绿 中、密 光滑 0.929a 0 100 733.16a 0.90a Ⅲ 65.19b −7.32c 35.54a 黄绿 小、密 光滑 0.943a 0 100 729.30a 0.91a Ⅳ 73.63a 6.95a 28.79c 黄白 小、密 光滑 0.971a 0 100 742.68a 0.93a CK 56.51d −0.16b 33.20b 绿褐相间 大、密 中等 1.000a 0 100 753.53a 0.89a 同一列的不同字母表示经LSD多重比较差异显著(P < 0.05)。下同。
Data with different letters on same column indicate significant differences at P<0.05 (ANOVA Fisher’s LSD test). Same for below.表 2 不同果袋处理浙梨6号果实的内在品质
Table 2. Eating quality of Zheli No. 6 pears bagged in different pouches
处理
Treatment可溶性
固形物
Total
soluble
solids/%可溶性
总糖
Total soluble
sugar/(mg·g−1)可滴定酸
Titratable
acid/%维生素C
Vitamin C/
(mg·g−1)糖酸比
Ratio of soluble
sugar and
titratable
acid甜度值
Sweetness
value蔗糖
Sucrose/
(mg·g−1)葡萄糖
Glucose/
(mg·g−1)果糖
Fructose/
(mg·g−1)山梨醇
Sorbitol/
(mg·g−1)苹果酸
Malic
acid/
(mg·g−1)柠檬酸
Citric
acid/
(mg·g−1)奎尼酸
Quinic
acid/
(mg·g−1)莽草酸
Shikimic
acid/
(mg·g−1)Ⅰ 13.34a 133.56a 0.16d 0.046b 85.12a 130.89bc 43.22a 6.89b 39.42b 34.66b 1.24e 0.63c 0.89bc 0.66d Ⅱ 13.86a 132.00a 0.21c 0.065a 62.12bc 126.94c 26.10 d 10.37a 45.82a 33.48b 1.55b 0.72a 0.94b 0.78b Ⅲ 13.62a 129.87a 0.19c 0.066a 68.14b 138.83a 38.94b 9.98a 45.41a 33.58b 1.50c 0.71a 0.81d 0.74c Ⅳ 13.56a 135.63a 0.31a 0.068a 43.89d 137.12ab 32.57c 10.11a 47.11a 37.59a 1.45d 0.67b 0.83cd 0.64e CK 13.94a 140.32a 0.26b 0.068a 54.85cd 126.65c 45.67a 6.65b 34.61c 39.37a 1.66a 0.53d 1.11a 0.90a 表 3 不同套袋方式浙梨6号果实的外观品质
Table 3. Appearance of Zheli No. 6 pears bagged once or twice
处理
TreatmentL a b 果皮色泽
Fruit peel color果点
Dot果面光滑度
Degree of
fruit skin
smoothness果锈指数
Fruit rust
index果锈位置
Rust location单果质量
Weight per
fruit/g果形指数
Fruit shape
index萼端
Calyx
end/%全果
Whole
fruit/%一次套袋
Single bagging63.42a −6.29b 36.23a 黄绿 小、密 光滑 0.743b 55 45 820.55a 0.89a 二次套袋
Twice bagging64.17a −5.28b 35.98a 黄绿 小、密 光滑 0.571c 85 15 778.03a 0.92a 对照CK 56.51b −0.16a 33.20b 绿褐相间 大、密 中等 1.00a 0 100 753.53a 0.89a 表 4 不同套袋方式浙梨6号果实内在品质
Table 4. Eating quality of Zheli No. 6 pears bagged once or twice
处理
Treatment可溶性
固形物
Total
soluble
solids/
%可溶性
总糖
Total
soluble
sugar/
(mg·g−1)可滴定酸
Titratable
acid/%维生素C
Vitamin C/
(mg·g−1)糖酸比
Ratio of
soluble
sugar
and
titratable
acid甜度值
Sweetness
value蔗糖
Sucrose/
(mg·g−1)葡萄糖
Glucose/
(mg·g−1)果糖
Fructose/
(mg·g−1)山梨醇
Sorbitol/
(mg·g−1)苹果酸
Malic
(acid/
mg·g−1)柠檬酸
Citri
acid/
(mg·g−1)奎尼酸
Quinic
acid/
(mg·g−1)莽草酸
Shikimic
acid/
(mg·g−1)一次套袋
Single bagging13.34a 133.56b 0.16b 0.046b 85.12a 130.89b 43.22b 6.89b 39.42b 34.66b 1.24b 0.63a 0.89b 0.66c 二次套袋
Twice bagging13.26a 147.77a 0.28a 0.063a 53.88b 138.54a 43.41b 9.19a 43.55a 31.19c 1.05c 0.45c 0.90b 0.70b 对照CK 13.94a 140.32ab 0.26a 0.068a 54.85b 126.65b 45.67a 6.65b 34.61c 39.37a 1.66a 0.53b 1.11a 0.90a 表 5 不同时期套袋处理浙梨6号果实的外观品质
Table 5. Appearance of Zheli No. 6 pears bagged at different times
处理
TreatmentL a b 果点 Dot 果面光滑度
Degree of fruit
skin smoothness单果质量
Weight per
fruit/g果形指数
Fruit shape
index直径
Diameter/mm密度
Density/(个·cm−2)盛花后10 d 10 d after full-bloom 58.80a −1.72c 33.23a 0.89d 13.28b 光滑 607.00c 0.85a 盛花后20 d 20 d after full-bloom 59.51a −1.34c 33.67a 1.15bc 13.39b 光滑 646.33bc 0.89a 盛花后30 d 30 d after full-bloom 60.69a −4.81 d 34.43a 1.08c 12.36b 光滑 650.77bc 0.88a 盛花后40 d 40 d after full-bloom 60.06a −3.74cd 34.46a 1.14bc 15.57ab 光滑 649.83bc 0.90a 盛花后50 d 50 d after full-bloom 59.93a −3.27cd 34.10a 1.21b 14.54ab 光滑 670.75b 0.86a 盛花后60 d 60 d after full-bloom 51.10c 8.25a 29.67c 0.93 d 17.63a 光滑 690.45ab 0.86a 对照 CK 54.58b 3.32b 31.07b 1.42a 18.54a 中等 737.98a 0.87a 表 6 不同时期套袋处理浙梨6号果实的内在品质
Table 6. Eating quality of Zheli No. 6 pears bagged at different times
处理
Treatment可溶性
固形物
Total
soluble
solids/%可溶性
总糖
Total
soluble
sugar/
(mg·g−1)可滴
定酸
Titratable
acid/%维生素C
Vitamin C/
(mg·g−1)糖酸比
Ratio of
soluble
sugar
and
titratable
acid甜度值
Sweetness
value蔗糖
Sucrose/
(mg·g−1)葡萄糖
Glucose/
(mg·g−1)果糖
Fructose/
(mg·g−1)山梨醇
Sorbitol/
(mg·g−1)苹果酸
Malic
acid/
(mg·g−1)柠檬酸
Citric
acid/
(mg·g−1)奎尼酸
Quinic
acid/
(mg·g−1)莽草酸
Shikimic
acid/
(mg·g−1)盛花后10 d
10 d after full-bloom13.03a 96.61b 0.19a 0.19a 52.05b 133.95abc 33.63bc 12.64ab 44.73a 32.99ab 0.61cd 0.60b 0.19d 0.056de 盛花后20 d
20 d after full-bloom13.25a 108.06ab 0.17a 0.18a 62.04ab 141.65ab 41.69abc 11.08b 43.81a 38.83a 1.02a 0.70a 0.31a 0.15a 盛花后30 d
30 d after full-bloom13.43a 110.83ab 0.18a 0.23a 61.14ab 127.28bc 36.56abc 11.81b 39.83a 31.89ab 0.57d 0.47d 0.25b 0.067d 盛花后40 d
40 d after full-bloom13.38a 107.21ab 0.20a 0.19a 53.94b 143.77ab 46.53a 13.88a 43.13a 30.12b 0.97a 0.44e 0.23bc 0.065d 盛花后50 d
50 d after full-bloom13.42a 116.44a 0.19a 0.17a 62.80ab 147.96a 46.36a 12.43ab 45.73a 32.16ab 0.68c 0.51c 0.23bc 0.050e 盛花后60 d
60 d after full-bloom13.32a 109.33ab 0.17a 0.17a 62.76ab 134.99abc 44.39ab 10.83b 39.71a 33.84ab 0.88b 0.40f 0.21cd 0.078c 对照 CK 13.80a 122.29a 0.17a 0.19a 71.68a 122.01c 32.82c 12.66ab 38.64a 31.78ab 0.84b 0.49d 0.29a 0.13b -
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