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New Zealand journal of experimental agriculture最新文献

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Effects of pasture allowance in winter on liveweight, wool growth, and wool characteristics of Romney ewes 冬季牧场补给量对罗姆尼母羊活重、羊毛生长和羊毛特性的影响
New Zealand journal of experimental agriculture Pub Date : 1987-07-01 DOI: 10.1080/03015521.1987.10425574
H. Hawker, K. Thompson
{"title":"Effects of pasture allowance in winter on liveweight, wool growth, and wool characteristics of Romney ewes","authors":"H. Hawker, K. Thompson","doi":"10.1080/03015521.1987.10425574","DOIUrl":"https://doi.org/10.1080/03015521.1987.10425574","url":null,"abstract":"Abstract In each of two years, pasture allowances of 0.7, 1.2, 1.7, or 2.2 kg dry matter (DM)/ewe per day were offered to groups of Romney ewes for 6 weeks in June — July. The ewes were then run together until weaning in December. In Year 1 there were 70 2-year-old ewes per group; mean initial liveweight was 47 (SE 0.25) kg. In Year 2 each group comprised 25 2-year-old ewes with a mean initial liveweight of 48 (SE 0.49) kg and 25 6-year-old ewes with a mean initial liveweight of 57 kg. For liveweight change (g/day), the inverse linear relationship with pasture allowance (kg DM/ewe per day) for ewes with one lamb in utero was: [liveweight change = 136 (SE 4.4) — (132 (SE 5.0) allowance)]. On average, the pasture allowance that resulted in zero liveweight change was predicted to be 1.0 kg DM/ewe per day. With a pregrazing pasture mass of c. 2000 kg DM/ha, zero liveweight change was associated with a residual pasture mass of 760 kg DM/ha, a utilisation of 66%, and an apparent intake of 0.59 kg DM/ewe per day...","PeriodicalId":19285,"journal":{"name":"New Zealand journal of experimental agriculture","volume":"10 1","pages":"295-302"},"PeriodicalIF":0.0,"publicationDate":"1987-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91285025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Boysenberry: Effect of 4-chlorophenoxyacetic acid on yield components and maturity 波森莓:4-氯苯氧乙酸对产量组成及成熟度的影响
New Zealand journal of experimental agriculture Pub Date : 1987-07-01 DOI: 10.1080/03015521.1987.10425578
C. Kingston
{"title":"Boysenberry: Effect of 4-chlorophenoxyacetic acid on yield components and maturity","authors":"C. Kingston","doi":"10.1080/03015521.1987.10425578","DOIUrl":"https://doi.org/10.1080/03015521.1987.10425578","url":null,"abstract":"Abstract Boysenberry (Rubus hybrid) plants were sprayed to run-off with 4-chlorophenoxyacetic acid (4-CPA) at 100 mg litre-1, in the 1983–84 season, when 80% of flowers had reached anthesis. Harvested yield was not affected by 4-CPA treatment. Berry size was significantly increased because of greater numbers of drupelets in the berries. Drupelet numbers were always increased by 4-CPA, irrespective of the level of insect pollination. Fruit from plants sprayed with 4-CPA ripened one week later than fruit from unsprayed plants, but length of harvest period remained unaltered.","PeriodicalId":19285,"journal":{"name":"New Zealand journal of experimental agriculture","volume":"15 1","pages":"325-331"},"PeriodicalIF":0.0,"publicationDate":"1987-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74232742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The effects of pasture management on population density and diseases of porina (Lepidoptera: Hepialidae). 牧草管理对粉蚧种群密度及病害的影响。
New Zealand journal of experimental agriculture Pub Date : 1987-07-01 DOI: 10.1080/03015521.1987.10425585
K. Stewart, R. Archibald
{"title":"The effects of pasture management on population density and diseases of porina (Lepidoptera: Hepialidae).","authors":"K. Stewart, R. Archibald","doi":"10.1080/03015521.1987.10425585","DOIUrl":"https://doi.org/10.1080/03015521.1987.10425585","url":null,"abstract":"Abstract In a field trial carried out at three sites over 2 years at Owaka, South Otago, mob stocking of pasture by sheep in February caused up to 75% mortality of porina (Wiseana spp.) larvae. Mob stocking in March had less effect, suggesting that small larvae, living on or near the soil surface and forming a high proportion of the populations until late February, were most affected. There was no evidence that mob stocking affected the prevalence of virus diseases in porina populations, but microsporidial infections and parasites were higher in mob stocked compared with untreated or haymaking treatments. Haymaking did not effect porina density in the first year; it did, however, effect both porina density in the second year and virus prevalence in each year, the effects varying between sites. The reasons for this were not understood.","PeriodicalId":19285,"journal":{"name":"New Zealand journal of experimental agriculture","volume":"19 1","pages":"375-379"},"PeriodicalIF":0.0,"publicationDate":"1987-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81941178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Seasonal frost tolerance of some ornamental, indigenous New Zealand plant species in the genera Astelia, Dicksonia, Leptospermum, Metrosideros, Phormium, Pittosporum, and Sophora 新西兰本土观赏植物Astelia属、Dicksonia属、Leptospermum属、Metrosideros属、Phormium属、Pittosporum属和Sophora属的季节抗冻性
New Zealand journal of experimental agriculture Pub Date : 1987-07-01 DOI: 10.1080/03015521.1987.10425582
I. Warrington, C. J. Stanley
{"title":"Seasonal frost tolerance of some ornamental, indigenous New Zealand plant species in the genera Astelia, Dicksonia, Leptospermum, Metrosideros, Phormium, Pittosporum, and Sophora","authors":"I. Warrington, C. J. Stanley","doi":"10.1080/03015521.1987.10425582","DOIUrl":"https://doi.org/10.1080/03015521.1987.10425582","url":null,"abstract":"Abstract The frost hardiness temperature (i.e., the temperature that causes damage) and the lethal temperature (i.e., the temperature that causes death) were assessed in autumn (April-May), winter (July), spring (October), and summer (January) for 10 native plant species. The species in order of increasing winter hardiness/lethal temperature were Metrosideros kermadecensis and M. carminea ( — 3/ — 5°C), Sophora tetraptera and S. microphylla (-4/-6°C), Leptospermum scoparium (-5/-8°C), Sophora prostrata (-6/-11 °C), Dicksonia fibrosa ( — 8/-11 °C), Phormium spp. ( — 6/-11 °C), Astelia chathamica ( — 8/ — 11 °C), and Pittosporum tenuifolium ‘Irene Paterson’ (-9/ — 14°C). In summer, all species had frost hardiness temperatures between-2 and-5°C and lethal temperatures between-4 and — 9°C, except the two Metrosideros species where these temperatures were-1 and-2°C, respectively. No differences among cultivars of Leptospermum scoparium (°;Martinii’;, ‘Burgundy Queen’, and ‘Nanum Huia’) or Phormium spp. (‘Maori...","PeriodicalId":19285,"journal":{"name":"New Zealand journal of experimental agriculture","volume":"26 1","pages":"357-365"},"PeriodicalIF":0.0,"publicationDate":"1987-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83553355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 22
Application of molybdenum to inoculated, lime-coated white clover seed 钼在接种石灰包衣白三叶草种子上的应用
New Zealand journal of experimental agriculture Pub Date : 1987-07-01 DOI: 10.1080/03015521.1987.10425571
W. Lowther
{"title":"Application of molybdenum to inoculated, lime-coated white clover seed","authors":"W. Lowther","doi":"10.1080/03015521.1987.10425571","DOIUrl":"https://doi.org/10.1080/03015521.1987.10425571","url":null,"abstract":"Abstract Three experiments were carried out to compare the effects of applying molybdenum (Mo) to inoculated, coated (pelleted) seed with applying Mo in fertiliser on Mo-deficient tussock grassland soils. White clover (Trifolium repens L.) growth was stimulated by Mo with no apparent differences in the effectiveness of pellet-or fertiliser-applied Mo. The application of Mo to pelleted seed had no detectable effects on the survival of rhizobia on the seed, early seedling establishment, or seedling nodulation. On Mo-deficient soils the application of Mo to pelleted seed is recommended, not only to ensure an even distribution of Mo but also to ensure placement of Mo in the immediate vicinity of the establishing legume seedlings.","PeriodicalId":19285,"journal":{"name":"New Zealand journal of experimental agriculture","volume":"31 1","pages":"271-275"},"PeriodicalIF":0.0,"publicationDate":"1987-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74991608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A binomial sequential decision plan for control of two-spotted spider mite on strawberries in Canterbury. 坎特伯雷草莓双斑蜘蛛螨防治的二项序列决策方案。
New Zealand journal of experimental agriculture Pub Date : 1987-07-01 DOI: 10.1080/03015521.1987.10425584
M. R. Butcher, D. Penman, R. R. Scott
{"title":"A binomial sequential decision plan for control of two-spotted spider mite on strawberries in Canterbury.","authors":"M. R. Butcher, D. Penman, R. R. Scott","doi":"10.1080/03015521.1987.10425584","DOIUrl":"https://doi.org/10.1080/03015521.1987.10425584","url":null,"abstract":"Abstract The development of a binomial sequential decision plan, incorporating Taylor's power law, for control of two-spotted spider mite on strawberries in Canterbury is described and compared with a recommended spray schedule. No significant difference existed in yields between the two systems but savings of up to 4 cyhexatin applications were made by following the binomial sequential decision plan. Together with the monetary savings (NZ$500/ha, 1986 prices) from a reduction in spray applications, the problems associated with applied pesticides, resistance, and residues are minimised.","PeriodicalId":19285,"journal":{"name":"New Zealand journal of experimental agriculture","volume":"179 1","pages":"371-374"},"PeriodicalIF":0.0,"publicationDate":"1987-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77004735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Nitrogen fixation during improvement of North Island hill country pastures 北岛丘陵牧场改良过程中的固氮作用
New Zealand journal of experimental agriculture Pub Date : 1987-07-01 DOI: 10.1080/03015521.1987.10425570
M. G. Lambert
{"title":"Nitrogen fixation during improvement of North Island hill country pastures","authors":"M. G. Lambert","doi":"10.1080/03015521.1987.10425570","DOIUrl":"https://doi.org/10.1080/03015521.1987.10425570","url":null,"abstract":"Abstract Nitrogen (N) fixation was measured, using the acetylene reduction assay, in hill pastures at the Ballantrae Hill Country Research Station near Woodville. Measurements were made over a 12 month period starting in September 1976, on sunny and shady aspects of the six fertiliser × grazing management treatment combinations of a larger grazing trial. Fertiliser treatments were LF (750 kg/ha superphosphate total over the previous 4 years) and HF (1800 kg/ha total plus 1250 kg/ha ground limestone). Grazing managements were set stocking with sheep (SSS), and rotational grazing with sheep (RGS) or cattle (RGC). Annual fixation averaged 103 kg N/ha in LF and 201 kg N/ha in HF pastures, and 105,129 and 224 kg N/ha in SSS, RGS, and RGC pastures respectively. These levels were in contrast to an annual level of 34 kg N/ha measured within the same area 2 years previously, when pasture improvement was much less advanced. Annual N fixation was similar on sunny and shady aspects, but the pattern of seasonal fixati...","PeriodicalId":19285,"journal":{"name":"New Zealand journal of experimental agriculture","volume":"17 1","pages":"267-270"},"PeriodicalIF":0.0,"publicationDate":"1987-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82023885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
An evaluation of a phenological model (PETE) to assist insect pest control in apple orchards in Canterbury, New Zealand 物候模型(PETE)在新西兰坎特伯雷苹果园害虫防治中的应用评价
New Zealand journal of experimental agriculture Pub Date : 1987-07-01 DOI: 10.1080/03015521.1987.10425586
A. Tomkins, D. Penman, R. Chapman, S. Worner
{"title":"An evaluation of a phenological model (PETE) to assist insect pest control in apple orchards in Canterbury, New Zealand","authors":"A. Tomkins, D. Penman, R. Chapman, S. Worner","doi":"10.1080/03015521.1987.10425586","DOIUrl":"https://doi.org/10.1080/03015521.1987.10425586","url":null,"abstract":"Abstract An evaluation was conducted of a model (PETE) for predicting the phenology of codling moth (Cydia pomonella L.) and the lightbrown apple moth (Epiphyas postvittana (Walker)) in apple orchards in Canterbury, New Zealand. Validation data consisted of adult flights recorded with pheromone traps for codling moth, and bait trap catches and the occurrence of eggs and larvae recorded by destructive sampling of apple tree clusters for lightbrown apple moth. Key events in the life history of both pests occurred over extended periods because of mild winters affecting diapause termination for codling moth and the complete absence of diapause by the lightbrown apple moth. The model was able to reflect observed pest phenology but some problems were encountered and these are discussed.","PeriodicalId":19285,"journal":{"name":"New Zealand journal of experimental agriculture","volume":"44 1","pages":"381-388"},"PeriodicalIF":0.0,"publicationDate":"1987-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89209224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Feijoa fruit: Growth and chemical composition during development 菲荷果:发育过程中的生长和化学成分
New Zealand journal of experimental agriculture Pub Date : 1987-04-01 DOI: 10.1080/03015521.1987.10425561
J. Harman
{"title":"Feijoa fruit: Growth and chemical composition during development","authors":"J. Harman","doi":"10.1080/03015521.1987.10425561","DOIUrl":"https://doi.org/10.1080/03015521.1987.10425561","url":null,"abstract":"Abstract The growth and chemical composition of feijoa fruit (Feijoa sellowiana Berg or Acca sellowiana) harvested at different stages of maturity were examined. Fruit growth showed a double sigmoid pattern characterised by a rapid final growth phase which lasted until abscission and fruit fall from the tree. The respiration rate of young fruit was high (120 mg CO2 kg-1h-1) but declined to a preclimacteric minimum (20–30 mg CO2 kg-1 h-1) 80–100 days after anthesis, and then increased as the fruit matured and ripened. Sugar and organic acid content of fruit harvested less than 80 days after anthesis was low but increased after 90 days, until fruit fall. Calcium, magnesium, and potassium content of feijoa fruit increased throughout maturation.","PeriodicalId":19285,"journal":{"name":"New Zealand journal of experimental agriculture","volume":"29 1","pages":"209-215"},"PeriodicalIF":0.0,"publicationDate":"1987-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77703739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 29
Red tamarillos (Cyphomandra betacea) : post-harvest control of fungal decay with hot water and imazalil dips 红柽柳(Cyphomandra betacea):采收后用热水和吡唑啉浸液控制真菌腐烂
New Zealand journal of experimental agriculture Pub Date : 1987-04-01 DOI: 10.1080/03015521.1987.10425563
C. Yearsley, H. Mcgrath, J. Taucher, J. R. Dale
{"title":"Red tamarillos (Cyphomandra betacea) : post-harvest control of fungal decay with hot water and imazalil dips","authors":"C. Yearsley, H. Mcgrath, J. Taucher, J. R. Dale","doi":"10.1080/03015521.1987.10425563","DOIUrl":"https://doi.org/10.1080/03015521.1987.10425563","url":null,"abstract":"Abstract A hot water dip at 50°C for 8 min effectively controlled quiescent infections in red tamarillos (Cyphomandra betacea (Cav.) Sendt.) caused by Colletotrichum gloeosporioides (Penz.) Arx and C. acutatum Simmonds. This dip reduced the percentage of fruit with body lesions without significantly increasing peduncle necrosis. Fungi colonising damaged peduncle tissue were controlled using an imazalil dip (1 min at 15–20°C) at 250 mg active ingredient/litre. The method of imazalil application (in hot water, as a separate cold water dip, or in wax) did not affect its efficacy. Imazalil residues in skin, pulp, and whole fruit were lowest when the fungicide was applied as a separate cold water dip. Storage disorders were significantly reduced using the hot water/imazalil dip, allowing 7 days shelf-life at 20°C after 8 weeks cool storage at 3.5°C.","PeriodicalId":19285,"journal":{"name":"New Zealand journal of experimental agriculture","volume":"46 1","pages":"223-228"},"PeriodicalIF":0.0,"publicationDate":"1987-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79029465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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