Effects of calcium and nitrogen sources on corking of apples (malus domesticaborkh.)
作者:
G. M. Greene,
C. B. Smith,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1979)
卷期:
Volume 10,
issue 1-2
页码: 129-139
ISSN:0010-3624
年代: 1979
DOI:10.1080/00103627909366883
出版商: Taylor & Francis Group
关键词: cork spot;bitter pit;lime types;lime rates;calcium sources;nitrogen sources;leaf analyses;fruit analyses;NCa ratio
数据来源: Taylor
摘要:
Effects on nutrient uptake and incidence of corking on Yorking/M106 of various Ca and N sources applied prior to orchard planting are reported. After 3 years, no treatment consistently reduced cork spots/fruit. Calcitic, calcitic with 3% Mg, hydrated, and dolomitic lime at 11.2 MT/ha increased leaf Ca, calcitic by 15%, dolomitic by 6%. All but hydrated decreased leaf K. Hydrated gave highest leaf P. All types increased leaf Mg, dolomitic by 24%, calcitic by 20%. All types decreased leaf Mn. Increasing lime up to 33.6 MT/ha further increased leaf Ca, soil injection at 40 cm depth giving highest leaf and peel, but not highest flesh Ca. Of triple superphosphate, gypsum, or calcium chloride added to lime, calcium chloride, though toxic to some trees, had the greatest effect, incresing leaf P,K, and Ca, and lowering N and Mg. Calcium chloride did not raise leaf Ca above that from the deep‐lime treatment. When sodium nitrate, calcium nitrate, or ammonium sulfate were applied at 18 g N/year of tree age, calcium nitrate increased leaf, peel, and flesh Ca as compared to ammonium sulfate. Ammonium sulfate depressed B in flesh and peel. Results showed nutritional status can be substantially changed with little effect on corking.
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