Journal of New Zealand Grasslands最新文献_第3页

Farm-level cost-effectiveness analysis of in-paddock feeding of methane inhibitors in pasture-based dairy 牧场牧场饲用甲烷抑制剂的成本效益分析

Journal of New Zealand Grasslands Pub Date : 2023-11-10 DOI: 10.33584/jnzg.2023.85.3655

Callum Eastwood, Benjamin Marmont, David Silva-Villacorta, Zack Dorner, Elena Minnee, Mark Neal

{"title":"Farm-level cost-effectiveness analysis of in-paddock feeding of methane inhibitors in pasture-based dairy","authors":"Callum Eastwood, Benjamin Marmont, David Silva-Villacorta, Zack Dorner, Elena Minnee, Mark Neal","doi":"10.33584/jnzg.2023.85.3655","DOIUrl":"https://doi.org/10.33584/jnzg.2023.85.3655","url":null,"abstract":"Various approaches have been proposed to reduce methane emissions from ruminant livestock systems. While methane-inhibiting feed-additives are not yet commercially available in New Zealand, it has been reported that they can reduce enteric methane emissions by 30-90% when fed to ruminant livestock regularly and precisely in total mixed ration systems. This study aims to determine the primary economic performance drivers of using In-Paddock Smart-Feeders (IPSF) for delivering methane inhibitors in pasture-based dairy to understand the conditions in which they are viable. A farm-level financial model is developed, drawing on the Economic Farm Survey produced by DairyNZ. Both a scenario and sensitivity analysis are conducted on the cost-effectiveness of the approach for methane mitigation. The main finding is that the largest cost associated with the approach is the cost of additionalsupplement, which would acts as a carrier for the methane inhibitor. Therefore, the quantity of additional supplement used prior to adoption is a key determinant of viability. There is a large range in breakeven methane prices depending on the value of assumptionsused. More certainty in these assumptions is required to fully understand the potential use of IPSFs to deliver methane-inhibiting feed-additives in-paddock.","PeriodicalId":36573,"journal":{"name":"Journal of New Zealand Grasslands","volume":" 1048","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135186197","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: 0

Māori cultural values and soil fertility management – an exploratory study Māori文化价值与土壤肥力管理-一项探索性研究

Journal of New Zealand Grasslands Pub Date : 2023-11-10 DOI: 10.33584/jnzg.2023.85.3640

Xiaomeng Lucock, Jim Moir, Diane Ruwhiu

{"title":"Māori cultural values and soil fertility management – an exploratory study","authors":"Xiaomeng Lucock, Jim Moir, Diane Ruwhiu","doi":"10.33584/jnzg.2023.85.3640","DOIUrl":"https://doi.org/10.33584/jnzg.2023.85.3640","url":null,"abstract":"Collectively owned Māori farming entities work much of the remaining Māori freehold land in Aotearoa New Zealand (~5% of total) and the majority of these are registered in the Māori Land Court. The effective and sustainable management of these farms is vital tolandowners (e.g., whānau/hapū/iwi) whose prosperity is dependent on the wealth and strength of connection generated from this land (whenua), which is also a source of wellbeing. There are some distinct features of the institutional factors of Māori farms that impact on how they are managed. For example, because Māori land can never be sold (Te Ture Whenua Māori Act 1993), realising capital gain is not an option for Māori farmers. Māori farm managers hence focus on cashflow and profit within the farming operations, which can sometimes put pressure on important yet discretionary investment expenditures, such as fertiliser costs (Cottrell 2016). However, as nutrients are taken off farms through animal products, soil fertility management is fundamental to the replenishing of nutrients on farms to maintain productivity and profitability (Haynes and Williams 1993). Consequently, fertiliser costs take up a significant proportion of farm expenditure for most New ealand farms, impacting on their profitability (Hedley 2015). The retention and control of Māori land remains a top priority for Māori land managers, with whom the continuous provision of return through productivity or profitability is seen as essential for landowners (e.g., whānau), and the long-term sustainable managementand delivery of services is largely driven by cultural values. So, where does the balance lie between ongoing provision and potentially discretionary expenditure? The present research set out to explore the nuances behind such a question.","PeriodicalId":36573,"journal":{"name":"Journal of New Zealand Grasslands","volume":" 998","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135185936","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: 0

An assessment of the agronomic effectiveness of N‐(n‐butyl) thiophosphoric triamide (nBTPT) - treated urea on the production of clover-based pastures, pastures, grasses and crops. N - (N -丁基)硫代磷三酰胺(nBTPT)处理尿素对三叶草牧场、牧场、牧草和作物生产的农艺效益评估

Journal of New Zealand Grasslands Pub Date : 2023-11-10 DOI: 10.33584/jnzg.2023.85.3637

Douglas Edmeades, Robert McBride

{"title":"An assessment of the agronomic effectiveness of N‐(n‐butyl) thiophosphoric triamide (nBTPT) - treated urea on the production of clover-based pastures, pastures, grasses and crops.","authors":"Douglas Edmeades, Robert McBride","doi":"10.33584/jnzg.2023.85.3637","DOIUrl":"https://doi.org/10.33584/jnzg.2023.85.3637","url":null,"abstract":"Approximately 50% of the world’s population depends on nitrogen (N) fertiliser to secure a sustainable food supply. Improving the efficiency of nitrogen fertiliser – the nitrogen use efficiency (NUE) - is a major goal both nationally and internationally, driven by the need to reduce the environmental footprint of farming. One of the technologies developed for this purpose is the addition of the urease inhibitor, N-(n-butyl) thiophosphoric triamide (nBTPT), to urea, to reduce the volatilisation of ammonia from the soil. In this paper we report the results from field trials, recorded in the national and international literature, comparing the effects of nBTPT treated urea, relative to untreated urea, on plant dry matter (DM) yields (cloverbased pasture, grasses and arable crops) from 45 studies summarizing the results on a site × year × crop basis. For the aggregated data (n = 348) the marginal yield results were normally distributed around a mean of about 3% (95% confidence interval 0.9), with a range from -23% to +32%. The results for the various subsets (based on different crop types) of data were very similar. The size of the effect of nBTPT was related to the rate of N application.","PeriodicalId":36573,"journal":{"name":"Journal of New Zealand Grasslands","volume":" 997","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135185937","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: 0

Five-year old diversified pasture delivers greater lamb liveweight gain than a standard perennial ryegrass-white clover pasture 5年龄的多样化牧场比标准的多年生黑麦草-白三叶草牧场提供更大的羔羊活重增重

Journal of New Zealand Grasslands Pub Date : 2023-11-10 DOI: 10.33584/jnzg.2023.85.3648

Thomas Maxwell, Hamish Cartwright, James Meyer, Omar Al-Marashdeh

{"title":"Five-year old diversified pasture delivers greater lamb liveweight gain than a standard perennial ryegrass-white clover pasture","authors":"Thomas Maxwell, Hamish Cartwright, James Meyer, Omar Al-Marashdeh","doi":"10.33584/jnzg.2023.85.3648","DOIUrl":"https://doi.org/10.33584/jnzg.2023.85.3648","url":null,"abstract":"This study investigated liveweight gain of lambs grazing five-year-old pasture of either Italian ryegrass, red clover and plantain (Diversified) or perennial ryegrass and white clover (Standard). Coopworth lambs were born to either diversified or standard pasture and reared there until weaning in December (early summer). Liveweight gain (LWG) from tailing to weaning was 23% higher in lambs on diversified pasture (0.335 kg LWG/lamb/day) compared to those on standard pasture (0.272 kg LWG/lamb/day). From summer to autumn (December to May), liveweight, pasture mass, botanical composition and nutritive quality was measured as weaned lambs progressed through rotationally grazed paddocks of either diversified or standard pasture. Similar lamb liveweight gain betweenpasture types was observed over summer and autumn, with both groups averaging 0.187 kg LWG/lamb/day. From December to May, dry matter intakes (DMI) and feed conversion efficiencies (FCE) were similar between lambs grazing on either diversified or standardpasture. Average final lamb liveweight off diversified pasture was 4.2 kg higher than off standard pasture. The higher pre-weaning liveweight gain and subsequent greater weaning liveweight off diversified pasture was maintained throughout the summer and autumn.","PeriodicalId":36573,"journal":{"name":"Journal of New Zealand Grasslands","volume":" 592","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135185963","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: 0

Drought impacts African black beetle feeding on perennial ryegrass 干旱影响了以多年生黑麦草为食的非洲黑甲虫

Journal of New Zealand Grasslands Pub Date : 2023-11-10 DOI: 10.33584/jnzg.2023.85.3664

Katrin Gabriela Hewitt, Craig B. Phillips, Rainer W. Hofmann, Olivier J. Ball, Dongwen Luo, Alison J. Popay

{"title":"Drought impacts African black beetle feeding on perennial ryegrass","authors":"Katrin Gabriela Hewitt, Craig B. Phillips, Rainer W. Hofmann, Olivier J. Ball, Dongwen Luo, Alison J. Popay","doi":"10.33584/jnzg.2023.85.3664","DOIUrl":"https://doi.org/10.33584/jnzg.2023.85.3664","url":null,"abstract":"interactions between plants, herbivorous insects and fungal Epichloë endophytes. However, water availability fluctuates, a phenomenon intensified by climate change, challenging the success of NewZealand’s pastoral industry. The impacts of climatic changes, such as intensifying drought, on pastoral insect pests have received little attention. In a no-choice bioassay, African black beetle (ABB) were fed semi-synthetic diets containing freeze-dried foliage material from drought-exposed and well-watered perennial ryegrass containing endophyte strains AR37 or NZCT, or with material free of endophyte (Nil). Diet consumption, beetle weight change, fungal alkaloid concentrations, phytohormones, and NRI (nitrogen reflectance index) concentrations were measured and compared. Except for AR37, ABB consumed more diets containing drought-exposed rather than well-watered material, with a 61% increase in Nil and a 50% increase in diets containing NZCT, though these effects were not accompanied by corresponding ABB weight changes. Here, we discuss the implications of these results on ABB damage in New Zealand pastures in the context of increasing drought and illustrate how spatial patterns of ABB damage could change over the next 75 years. Areas that do not currently have high populations of ABB such as Manawatū-Whanganui, Wairarapa and Marlborough will become increasingly vulnerable to damage.","PeriodicalId":36573,"journal":{"name":"Journal of New Zealand Grasslands","volume":" 1039","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135186057","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: 0

Stacking nitrogen leaching mitigations in a Canterbury dairy system whilst minimising profitability losses. 堆积氮淋溶减缓在坎特伯雷乳品系统，同时最大限度地减少盈利损失。

Journal of New Zealand Grasslands Pub Date : 2023-11-10 DOI: 10.33584/jnzg.2023.85.3638

Taisekwa Lordwell Chikazhe, Pierre Beukes, Racheal Bryant, Jacobus Kok, Stewart Ledgard, J.Paul Edwards, Claire Phyn

{"title":"Stacking nitrogen leaching mitigations in a Canterbury dairy system whilst minimising profitability losses.","authors":"Taisekwa Lordwell Chikazhe, Pierre Beukes, Racheal Bryant, Jacobus Kok, Stewart Ledgard, J.Paul Edwards, Claire Phyn","doi":"10.33584/jnzg.2023.85.3638","DOIUrl":"https://doi.org/10.33584/jnzg.2023.85.3638","url":null,"abstract":"The aim of this project was to model combinations (“stacks”) of cost-effective nitrogen (N) leaching mitigations within a dairy system that could reduce N leaching by 40-60%, whilst minimising losses in profitability. A FARMAX and OverseerFM combination was used to model a baseline farm representing a typical Canterbury system, and seven sequentially “stacked” mitigated systems. The mitigations were combined and stacked in the following order based on mechanism(s) of action, practicality, and cost-effectiveness: 1) reduced synthetic N fertiliser input (from 190 to 100 kg N/ha/year); 2) including Italian ryegrass in the pasture sward; 3) including plantain in the pasture sward; 4) earlier calving and drying off (by 10 days); 5) wintering on pasture and baleage; 6) standing cows off-pasture;7) using new-generation nitrification inhibitors. The most cost-effective stack combined mitigations 1 to 5. We estimated that N leaching was reduced by 57% relative to baseline, with an 8% reduction in operating profit. Greenhouse gas emissions were reduced by 8%. The largest single reduction in N leaching was from stack #5, and it coincided with no/little change in milk production pasture eaten and had no capital cost. A careful selection of complementary mitigations could achieve significant reductions in N leaching without compromising greenhouse gas emissions and, to any great extent, profitability.","PeriodicalId":36573,"journal":{"name":"Journal of New Zealand Grasslands","volume":" 589","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135185966","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: 0

Variation in kale and fodder beet yield and quality over winter affects nutrient supply to non-lactating dairy cows at the Southern Dairy Hub 冬季羽衣甘蓝和饲料甜菜产量和质量的变化影响了南方乳品中心非泌乳奶牛的营养供应

Journal of New Zealand Grasslands Pub Date : 2023-11-10 DOI: 10.33584/jnzg.2023.85.3632

Nicole Wheadon, Dawn Dalley, Roshean Woods

{"title":"Variation in kale and fodder beet yield and quality over winter affects nutrient supply to non-lactating dairy cows at the Southern Dairy Hub","authors":"Nicole Wheadon, Dawn Dalley, Roshean Woods","doi":"10.33584/jnzg.2023.85.3632","DOIUrl":"https://doi.org/10.33584/jnzg.2023.85.3632","url":null,"abstract":"Estimating crop quality and quantity is important for feed budgeting and nutritional balancing of diets for winter grazing. Commonly, farmers measure crop dry matter (DM) yield in autumn, but few complete quality tests. We assessed the DM yield and quality oflate spring sown kale and fodder beet (FB) from early autumn to late winter over five years at the Southern Dairy Hub, Southland, New Zealand. Yield and quality parameters were analysed over time since sowing, using polynomial data fitting. We hypothesised thatcrop yields would remain stable during winter grazing, but that the supply of nutrients would vary, driven by a decline in the leaf proportion. Overall, crops showed rapid growth prior to winter but stable yields during winter grazing, but there was year to year variation in apparent growth trends and yields. The proportion of FB bulb increased over winter relative to the total crop yield for all cultivars and years. Fodder beet leaf was numerically higher in multiple nutrient concentrations (crude protein, Ca, Mg, P, S) compared to the bulb. For both crops, nutrients had only small fluctuations in concentration over time. Completing yield assessments in late autumn would give farmers a useful baseline yield indication for winter. Crop quality tests are recommended to identify any nutritional deficiencies that need addressing to ensure good animal health and performance.","PeriodicalId":36573,"journal":{"name":"Journal of New Zealand Grasslands","volume":" 615","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135186090","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: 0

Plantain (Plantago lanceolata L.) content within plantain/ perennial ryegrass (Lolium perenne L.) pastures may be limited by livestock treading damage 车前草/多年生黑麦草(Lolium perenne L.)牧场内车前草(Plantago lanceolata L.)含量可能受到家畜践踏损害的限制

Journal of New Zealand Grasslands Pub Date : 2023-11-10 DOI: 10.33584/jnzg.2023.85.3634

Sam Wilson, Daniel Donaghy, David Horne, Soledad Navarrete, Peter Kemp

{"title":"Plantain (Plantago lanceolata L.) content within plantain/ perennial ryegrass (Lolium perenne L.) pastures may be limited by livestock treading damage","authors":"Sam Wilson, Daniel Donaghy, David Horne, Soledad Navarrete, Peter Kemp","doi":"10.33584/jnzg.2023.85.3634","DOIUrl":"https://doi.org/10.33584/jnzg.2023.85.3634","url":null,"abstract":"TThere is evidence that plantain (Plantago lanceolata L.) persistence within perennial ryegrass (Lolium perenne L.) dominant dairy pastures is usually poor. One factor potentially limiting plantain content and persistence is treading damage, caused by cows grazingpasture while the soil moisture content is high. The impact of treading damage on plantain regrowth and survival was investigated in two field experiments at Massey University, Palmerston North. In a small-plot study, cow treading damage was simulated on separateplantain and perennial ryegrass pastures using a novel treading device. Subsequently, a larger-scale experiment investigated the impact of treading damage by grazing dairy cows on plantain regrowth and survival within a mixed plantain/perennial ryegrass pasture. Damage by the treading device, in late spring, immediately reduced the growth rate of both plantain and perennial ryegrasspastures by 30%, however neither plantain content nor density were reduced. In experiment 2, treading damage reduced the growth rate of the mixed pasture by 50% in early spring but it recovered during late spring. Plantain content and density were both initially reduced by the treading damage treatment but recovered to pretreading levels by autumn. These results suggest that treading damage from cows may be an important cause of reduced plantain content in dairy pastures during spring, however there was no evidence that treading damage reduced plantain persistence.","PeriodicalId":36573,"journal":{"name":"Journal of New Zealand Grasslands","volume":" 610","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135186094","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: 0

Incorporating plantain into ryegrass-white clover mixed sward for an economically and environmentally sustainable dairy system: Year one of a farm system study 将车前草纳入黑麦草-白三叶草混合草中，以实现经济和环境可持续的乳制品系统:农场系统研究的第一年

Journal of New Zealand Grasslands Pub Date : 2023-11-10 DOI: 10.33584/jnzg.2023.85.3635

Omar Al-Marashdeh, Gayani Herath, Charissa Thomas, Natalie McMillan, Roshean Woods, Racheal Bryant

{"title":"Incorporating plantain into ryegrass-white clover mixed sward for an economically and environmentally sustainable dairy system: Year one of a farm system study","authors":"Omar Al-Marashdeh, Gayani Herath, Charissa Thomas, Natalie McMillan, Roshean Woods, Racheal Bryant","doi":"10.33584/jnzg.2023.85.3635","DOIUrl":"https://doi.org/10.33584/jnzg.2023.85.3635","url":null,"abstract":"The objective of this replicated farm system study was to investigate the effect of increasing proportion of plantain (Plantago lanceolata L. cv. Ecotain) in a perennial ryegrass/white clover (RGWC) mixed sward on farm productivity, profitability and environmental footprint over the 2021/22 production season. A total of 108 dairy cows were blocked into nine herds of 12 cows.The herds were randomly allocated into one of three replicated pasture treatments sown with an increasing plantain seed rate: (i) RGWC with nil plantain (PL0); (ii) RGWC+3 kg/ha plantain seed rate (PL3) or (iii) RGWC+6 kg/ha plantain seed rate (PL6). Farmlet milkand pasture production were measured, and data was used to estimate farm profitability and environmental footprint using FARMAX and OverseerEd software, respectively. Increasing plantain seed rate from 3 to 6 kg/ha increased sward content of plantain from24% to 34% of DM in PL3 and PL6, respectively. Pasture production (average 12,988±473 kg DM/ha), total milksolids production (1,356±40 kg/ha) and farm profitability (4,347±354 NZ$/ha) were similar amongst treatments. Compared to PL0, estimated annual nitrogen leaching and nitrous oxide emissions were reduced by 21% and 30%, (P<0.001) and 4.3% and 6.0% (P<0.01) in PL3 and PL6, respectively. Results suggest that incorporation of plantain into dairy systems could be used as a strategy to reduce predictedenvironmental footprint while maintaining profitability. However, these results need to be confirmed over multiple production seasons.","PeriodicalId":36573,"journal":{"name":"Journal of New Zealand Grasslands","volume":" 601","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135186100","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: 0

Yield and persistence of legume monocultures grown in the Lees Valley, South Island High Country 南岛高地利斯谷单一栽培豆科植物的产量和持久性

Journal of New Zealand Grasslands Pub Date : 2023-11-10 DOI: 10.33584/jnzg.2023.85.3651

Sonya Olykan, Annamaria Mills, Richard Lucas, Malcolm Smith, Derrick Moot

{"title":"Yield and persistence of legume monocultures grown in the Lees Valley, South Island High Country","authors":"Sonya Olykan, Annamaria Mills, Richard Lucas, Malcolm Smith, Derrick Moot","doi":"10.33584/jnzg.2023.85.3651","DOIUrl":"https://doi.org/10.33584/jnzg.2023.85.3651","url":null,"abstract":"Six legume monocultures were established in the Lees Valley, North Canterbury (400 m a.s.l.), which has long cold winters. The stony soils have low pH, high aluminium concentration, and low water holding capacity, which can lead to severe summer soil moisturedeficits. The aim was to identify legumes that would survive and persist in this environment and, therefore, increase the available nitrogen in the pastoral system. Legume populations of 88±12 seedlings/m2 were established and ranged from 45 (sub clover) to 197seedlings/m2 (Caucasian clover). The highest yields were from ‘Pawera’ red clover at 2.5 and 2.9 t DM/ha in Years 2 and 3, ‘Demand’ white clover produced 1.7 and 2.6 t DM/ha, and ‘Endura’ Caucasian 1.8 and 1.7 t DM/ha. ‘Kaituna’ lucerne yields were low at 0.7 and 1.4 t DM/ha. Caucasian clover was the most persistent legume. A visual assessment in Year 5 found Caucasian was the only legume still dominating its plot (69%) with the lowest area of bare ground (11%). ‘Leura’ subterranean and ‘Bolta’ balansa annual clovers survived for four years but accumulated annual yields were low (<1.0 t DM/ha/yr), and the presence of unsown species was high (>50%). While red and white clover provided the highest yields for two years, Caucasian clover was the most persistent species and istherefore a legume recommended for this environment.","PeriodicalId":36573,"journal":{"name":"Journal of New Zealand Grasslands","volume":" 1041","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135186055","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: 0