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板栗早熟新品種白露香的選育

2023-04-29 00:00:00張樹航王浩李穎劉雨婷郭燕張馨方王廣鵬
果樹學報 2023年9期

摘" " 要:白露香是河北省農林科學院昌黎果樹研究所從興隆縣板栗實生大樹中選育出的早熟板栗新品種。堅果橢圓形,果皮紫褐色,果面油亮,茸毛少,筋線不明顯,底座大小中等,整齊度高;果肉淡黃色,質地細糯,風味香甜;平均單粒質量10.5 g,每苞平均含堅果2.4粒,出實率38.1%;水分含量(w,后同)49.5%,可溶性糖含量23.3%,淀粉含量51.9%,蛋白質含量4.23%,維生素C含量27.3 mg·100 g-1。該品種在河北省燕山地區9月上旬成熟。生長勢強,結果枝健壯,平均長度47.84 cm,每果枝平均著生刺苞2.16個。適應性強,耐瘠薄,抗旱性、抗寒性和耐貯性強,高抗栗疫病,抗栗紅蜘蛛和桃蛀螟。適宜在河北省板栗栽培區及相似區域的山地、丘陵、河灘沙地栽培。

關鍵詞:板栗;新品種;白露香;早熟

中圖分類號:S664.2 文獻標志碼:A 文章編號:1009-9980(2023)09-2010-06

收稿日期:2023-03-16 接受日期:2023-05-24

基金項目:河北省農林科學院科技創新專項(200KJCXZK-RW-5);河北省科技計劃項目(21326304D-3);河北省農林科學院科技示范與服務專項(科技示范基地建設:板栗)

作者簡介:張樹航,男,副研究員,碩士,主要從事板栗新品種選育及栽培生理研究。Tel:0335-2038232,E-mail:zhangshuhang1203@163.com

*通信作者Author for correspondence. Tel:0335-2022724,E-mail:wangguangpeng430@163.com

A new early-maturing chestnut cultivar Bailuxiang

ZHANG Shuhang1, WAGN Hao2, LI Ying1, LIU Yuting2, GUO Yan1, ZHANG Xinfang1, WANG Guangpeng1*

(1Changli Institute of Pomology, Hebei Academy of Agricultural and Forestry Sciences, Changli 066600, Hebei, China; 2Xinglong County Forestry and Grassland Bureau, Xinglong 067399, Hebei, China)

Abstract: Bailuxiang, a new early-maturing chestnut cultivar, was selected from the wild mature seedling chestnut trees in Yanshan Mountain of Xinglong county, Hebei province by Changli Institute of Pomology, Hebei Academy of Agricultural and Forestry Sciences. The mother tree is 70 years old, growing on the hillside. In 2001, the chestnut research group found the mother tree during the field investigation on the superior chestnut in Sandaohe township. The old chestnut seedling tree has the characteristics of early maturity, high yield, high quality and better tolerance of barren soil. After regional adaptability testing at three sites of Hebei province (including Xinglong, Qianxi and Kuancheng) over sixteen years from 2004 to 2020, it was finally selected in 2021. This cultivar is tall, the tree posture is half-spreading, and the tree has strong growth vigor. The biennial bearing branches are grayish brown in color. The size and density of lenticel are intermediate. Leaf color is yellow green. Leaves are ellipse with serrate, spreading, and gradually acute apex. The average length of catkin is 17.3 cm and the numbers of catkin on each biennial bearing branch is 7.8. The shape of bur is ellipse and bur is cruciform-cracked. The spine bundle on the bur is hard, the density is intermediate, and the average length of spine bundle is 1.4 cm. The nut color is purple-brown and bright, and the side nut shape is ellipse. The stripes on nut is not obvious, size of hilum is intermediate, and the regularity of nuts is high. The flesh of nut is faint yellow in color, fine-textured and smooth. The nuts are perfect for stir-fry purpose. Cooked nut taste is fragrant and glutinous. And the nut average weight is 10.5 g, each bur contains an average of 2.4 nuts, with a seed yield of 38.1%. The water content is 49.5%, the total soluble sugar, starch and protein contents are 23.3%, 51.9% and 4.23%, respectively, and vitamin C content is 27.3 mg·100 g-1. Nut quality is excellent. It ripens in early September in Hebei area. Annual branches are strong, with an average length of 47.84 cm and a thickness of 0.76 cm. The average bearing shoot numbers on each biennial bearing branch is 3.65, and each biennial bearing branch has an average of 2.16 burs. The cltivar has good adaptability, and is resistant to barren soil, cold climate, drought, red mite and peach borer, and highly resistant to chestnut blight. The nut has very long storage-life. The new cultivar is appropriate to be planted in mountains, hills and beach sand of the chestnut cultivation area of Hebei province and similar areas. It is early fruiting and produces high yield. This cultivar can bear fruits next year after grafting. Trees grafted after four years has a high yield potential of 3 915.0 kg·hm-2. Orchards should be chosen on gneiss mountain or beach sandy lands. The spacing in the rows and spacing between rows are 4 m×4 m. The appropriate pollinizers are Yanxing and Yanming. The cultivar is suitable for training the natural open center system or two-layer small canopy sparse system. The new branches of young trees grow vigorously, and the effect of branch pulling and bud carving is excellent, which can achieve early bearing and high yield. The mature trees can adopt rotational and renewal pruning technology.

Key words: Chestnut; New cultivar; Bailuxiang; Early-maturing

板栗是我國的主要經濟林樹種,也是河北省特色和優勢干果,在山區脫貧致富、鄉村振興、農民增收等方面有著不可替代的作用[1-3]。板栗的早熟品種[4-6]有搶先上市的巨大優勢,因此,早熟板栗品種在市場上逐漸受到歡迎[7]。生產上現有品種存在成熟期相對集中(80%為中熟品種[8-13])、優質早熟品種較少、高產品種抗逆性差和不耐瘠薄等問題,造成板栗品質的良莠不齊,影響了果農的經濟效益[14-15]。針對這些問題,河北省農林科學院昌黎果樹研究所開展了板栗良種選育工作,選育出耐瘠薄、優質、豐產、早熟的板栗新品種白露香(圖1)。

1 選育經過

白露香板栗是從板栗實生種質資源中選出的板栗新品種,母樹為河北省興隆縣三道河鄉偏嶺子村的1株約70年生的實生板栗樹。2001年,河北省農林科學院昌黎果樹研究所板栗課題組在河北省興隆縣三道河鄉進行板栗資源調查時發現該品種母株,具有早熟、豐產、優質、耐瘠薄等特性。在原地進行了主要經濟性狀的調查鑒別后,定為初選優株,臨時命名為三道河1號,之后又連續實地調查評價2 a(年)。2004年,采其接穗引種到本單位良種選育圃進行主要農藝性狀的系統研究,并以北方板栗主栽品種(燕山早豐、大板紅)為對照,進行復選工作。2010年后,在燕山板栗主栽地區(興隆縣、遷西縣、寬城縣等)進行了多點區試試驗。經SSR分子標記分析,確定它與目前主栽品種燕山早豐和大板紅在分子水平上存在差異(圖2)。通過對植物學特征、生長結果習性、堅果性狀、豐產性、適應性等方面的研究與評價,證明三道河1號豐產穩產,優質,抗逆性強,優良農藝性狀表現穩定,可作為后備良種進行生產應用。2022年3月30日通過河北省林木品種審定委員會審定,命名為白露香,良種編號:冀S-SV-CM-005-2021。

2 主要性狀

2.1 植物學特征

植株樹體高大,樹姿半開張,生長勢強;樹干皮色深褐色;結果母枝健壯,分枝角度中等,枝條皮色灰褐色,皮孔中等大小,分布不規則,密度中等;葉片黃綠色,長橢圓形,平展,背面密被灰白色星狀毛,鋸齒中等,內向,先端漸尖;葉柄黃綠色,平均長度為1.9 cm;每果枝平均著生雄花序7.8條,斜生,平均長度17.3 cm;刺苞橢圓形,成熟時黃綠色,十字形開裂,苞皮厚度中等,平均苞質量46.5 g;刺束密度中等,硬度大,成熟時黃綠色,刺平均長度1.4 cm。

2.2 生長結果習性

白露香結果母枝平均抽生果枝數3.65條,每果枝平均著生刺苞2.16個,每苞平均含堅果2.4粒;幼樹生長勢強,盛果期后生長勢中庸;樹冠緊湊度一般;結果母枝芽萌發率78.8%,結果枝比例45.0%,雄花枝占比12.3%,發育枝占比23.7%;1年生枝條健壯,平均長度47.84 cm,粗0.76 cm,節間長1.62 cm,次年平均抽生結果新梢3.65條。白露香生長勢強,從表1可知,該品種樹高、樹冠面積高于對照品種,1年生枝長度、粗度大于對照品種。

2.3 果實經濟性狀

白露香刺苞橢圓形,平均每苞含堅果2.4粒,出實率38.1%;堅果橢圓形,紫褐色,油亮,茸毛少,筋線不明顯,底座大小中等,接線月牙狀或直線形,整齊度高,平均單粒質量10.5 g;果肉淡黃色,質地細糯,風味香甜,含水量49.5%,可溶性糖含量23.3%,淀粉含量51.9%,蛋白質含量4.23%,維生素C含量27.3 mg·100 g-1(表2)。適宜炒食,耐貯性強,腐爛率低,商品性優。

2.4 豐產穩產性

白露香幼樹生長勢強,雌花易形成,結果早,產量高,嫁接后第4年即進入豐產期。穩產性強,無大小年結果現象。早實性好,采用拉枝刻芽技術處理幼樹,嫁接第2年結果株率在95%以上,產量為1500~2250 kg·hm-2。盛果期產量可達3915.3 kg·hm-2。從表3可以看出,白露香和對照品種單株產量和盛果期平均產量沒有明顯差異,均屬于豐產型品種。

該品種連續結果能力較強,16年生嫁接樹連續3 a結果的母枝占80%,連續2 a結果的母枝占15%。樹冠投影面積產量0.5 kg·m-2以上,大小年產量差異度較小。

2.5 物候期

白露香在河北北部萌芽期4月17日,展葉期4月25日,雄花初花期6月8日,盛花期6月11日,末花期6月18日,果實成熟期9月6日左右,落葉期11月10日。由表4可知,白露香成熟期比燕山早豐晚5 d,較大板紅早9 d,在9月上旬成熟。

2.6 適應性及抗逆性

白露香適應性強,在平原沙地、河灘地及丘陵片麻巖、頁巖和花崗巖山地均能正常生長結果。參照板栗種質資源數據質量控制規范[16],采用田間調查法比較板栗白露香與對照品種的抗逆性,由表5可知,白露香栗對紅蜘蛛抗性強于對照品種,抗旱性強于燕山早豐。抗桃蛀螟、高抗栗疫病,抗寒性和耐貯性強。經在區試試驗點多年的連續觀察與調查,在現有品種常出現勢弱早衰的干旱片麻巖陡坡山地種植,白露香不出現早衰現象,且穩產性強,大小年結果現象不明顯。

3 栽培技術要點

該品種適宜片麻巖山地及河灘沙地栽植,栽植株行距以4 m×4 m為宜;授粉品種選用燕興[17]和燕明[10]等;樹形宜選用自然開心形和二層小冠疏層形;幼樹新梢生長勢強,拉枝、刻芽促成花效果較好,能達到早果豐產的目的;成齡大樹采用“板栗輪替更新整形修剪技術”,保持結果枝量為樹冠投影7~9條·m-2;秋后果園施基肥,春季萌芽前施入氮磷鉀復合肥,施肥后及時澆水;采用生物、物理和化學等方法綜合防治板栗紅蜘蛛和桃蛀螟等病蟲害。

4 綜合評價

白露香板栗適應性強,具有結果早、產量高、品質好的優良特性,并且無明顯病蟲危害,本身生物學性狀穩定,無大小年結果現象,抗旱、耐瘠薄性強。適宜在河北省板栗產區以及與此生態類型相似區域種植。

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