{"title":"The effect of defoliation on phenological development and yield in cauliflower","authors":"R. Boogaard, K. Kristensen","doi":"10.1080/14620316.1999.11511107","DOIUrl":null,"url":null,"abstract":"SummaryDecision support models used to reduce inputs of pesticides require a precise modelling of the changes in assimilate production and distribution, but also of possible changes in developmental rates due to sub-optimal conditions. Changes in developmental rates, which shorten or prolong the growing time may aggravate or reduce the effects of sub-optimal conditions on yield. Therefore, the effect of defoliation on development of cauliflower was investigated in a number of field experiments. Reduction in curd growth due to defoliation during the curd growth phase was compensated by an increased duration of curd growth. It was estimated that defoliation during curd induction corresponded to an increase in temperature sum requirement for curd induction of 15 to 25 degree days, while defoliation during curd growth increased the temperature sum requirement with 12 to 60 degree days. Measurement of maturity by means of curd specific weight showed that defoliation delayed maturity. This implies that yield lo...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511107","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Horticultural Science & Biotechnology","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1080/14620316.1999.11511107","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"HORTICULTURE","Score":null,"Total":0}
引用次数: 1
Abstract
SummaryDecision support models used to reduce inputs of pesticides require a precise modelling of the changes in assimilate production and distribution, but also of possible changes in developmental rates due to sub-optimal conditions. Changes in developmental rates, which shorten or prolong the growing time may aggravate or reduce the effects of sub-optimal conditions on yield. Therefore, the effect of defoliation on development of cauliflower was investigated in a number of field experiments. Reduction in curd growth due to defoliation during the curd growth phase was compensated by an increased duration of curd growth. It was estimated that defoliation during curd induction corresponded to an increase in temperature sum requirement for curd induction of 15 to 25 degree days, while defoliation during curd growth increased the temperature sum requirement with 12 to 60 degree days. Measurement of maturity by means of curd specific weight showed that defoliation delayed maturity. This implies that yield lo...
期刊介绍：
The Journal of Horticultural Science and Biotechnology is an international, peer-reviewed journal, which publishes original research contributions into the production, improvement and utilisation of horticultural crops. It aims to provide scientific knowledge of interest to those engaged in scientific research and the practice of horticulture. The scope of the journal includes studies on fruit and other perennial crops, vegetables and ornamentals grown in temperate or tropical regions and their use in commercial, amenity or urban horticulture. Papers, including reviews, that give new insights into plant and crop growth, yield, quality and response to the environment, are welcome, including those arising from technological innovation and developments in crop genome sequencing and other biotechnological advances.
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