瑞典核桃:护树、除草和施肥对种植核桃五年生存和生长的影响 × 中间NG23和NG38

IF 1.8 3区 农林科学 Q2 FORESTRY Scandinavian Journal of Forest Research Pub Date : 2023-06-27 DOI:10.1080/02827581.2023.2221038
J. P. Skovsgaard, U. Johansson, J. Englund, Stefan Juravle
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引用次数: 0

摘要

摘要本研究量化了不同栽培方式对核桃存活、枯死和早期生长的影响 × 在瑞典南部的一个统计设计的冰原田间试验中种植的中间品种NG23和NG38。建立实践包括使用或不使用护树(Populus maximowiczii × 毛果变种OP42在J。 × 媒介)、杂草控制(2 m2·树−1)和施肥(+25 g N·树−1·年−1)。NG23移植体在种植时比NG38移植体小。总生存率为97%。NG23的死亡率略高于NG38。在所有的治疗组合中都发生了Leader Shot枯死,但在有护树的情况下最为严重。NG23的死亡率低于NG38。未受枯死影响的树木的年高度增长随着生长季节降水量的增加而增加(194-407 mm),土壤质量在氮(94.10−3–607·10−3 g·g−1)、基本饱和度(14–99%)或有效土壤含水量(8.6–30.6 l·m−3)。杨树护树对其有负向影响,施肥对其有正向影响。杂草控制对身高增长没有影响,可能是由于实施效率低下。有护树的情况下,NG23的生长比NG38强。如果没有护树,情况正好相反。据推测,较少的生长和更多的枯死是由于对水的竞争造成的。
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Walnut in Sweden: effects of nurse trees, weed control and fertilization on five-year survival and growth of planted Juglans × intermedia NG23 and NG38
ABSTRACT This study quantified the effects of different establishment practices on survival, dieback and early growth of Juglans × intermedia NG23 and NG38 planted in a statistically designed field experiment on glacial till in southern Sweden. Establishment practices included the use or absence of nurse trees (Populus maximowiczii × trichocarpa var. OP42 planted one year before J. × intermedia), weed control (2 m2·tree−1) and fertilization (+25 g N·tree−1·year−1). NG23 transplants were smaller than NG38 at the time of planting. The overall survival rate was 97%. NG23 suffered marginally more mortality than NG38. Leader shoot dieback occurred in all treatment combinations but was most severe in the presence of nurse trees. NG23 suffered less dieback than NG38. Annual height growth of trees unaffected by dieback increased with increasing levels of precipitation during the growing season (194–407 mm) and with increasing soil quality in terms of nitrogen (94·10−3–607·10−3 g·g−1), base saturation (14–99%) or available soil water capacity (8.6–30.6 l·m−3). It was negatively influenced by poplar nurse trees and positively by fertilization. Weed control had no impact on height growth, possibly due to inefficient implementation. With nurse trees, NG23 had stronger growth than NG38. The opposite was true without nurse trees. It was hypothesized that less growth and more dieback resulted from competition for water.
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来源期刊
CiteScore
3.00
自引率
5.60%
发文量
26
审稿时长
3.3 months
期刊介绍: The Scandinavian Journal of Forest Research is a leading international research journal with a focus on forests and forestry in boreal and temperate regions worldwide.
期刊最新文献
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