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首页> 外文会议>Conference of the Australian Society of Sugar Cane Technologists >Effect of breaks and nitrogen fertiliser on shoot development, maintenance, and cane yield in an irrigated plant crop of Q117
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Effect of breaks and nitrogen fertiliser on shoot development, maintenance, and cane yield in an irrigated plant crop of Q117

机译：断裂和氮肥对灌溉植物作物灌溉植物作物灌溉发育，维护和甘蔗产量的影响

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A rotation experiment established at the BSES Sugar Experiment Station in the Burdekin in 1994 was returned to sugarcane in late August 1998. The experiment comprised six pre-history treatments, three of which were continual sugarcane with either trash retained, trash removed, and trash removed plus fumigation immediately prior to returning to sugarcane. The other three treatments were 42 month breaks of other crops, pasture, or bare fallow. All pre-history treatments were split to four rates of nitrogen fertiliser - 0, 50 kg/ha basal, 50 basal plus 130 kg/ha at 90 days after planting, and 0 basal plus 180 kg/ha at 90 days. Shoot and stalk development and maintenance, and crop yield were measured. There was no yield difference between any of the breaks and fumigated continual sugarcane, but these treatments outyielded continual sugarcane by around 30 t/ha or 26 percent. There was no response to nitrogen fertiliser following crop, bare fallow or fumigated sugarcane pre-histories, but a significantresponse following continual sugarcane and pasture pre-histories. The basis of the yield response was established during early shoot development. Initial primary shoot development was independent of available nitrogen (soil + fertiliser) but secondary tillering was strongly influenced by available nitrogen. In addition, shoot retention was improved with enhanced nitrogen status. The yield differential between break pre-histories and continual sugarcane ranged from 48 percent when no nitrogen was applied to 13 percent at the maximum nitrogen rate of 180 kg/ha. It is suggested that, in a system with high inputs of radiation, water and nitrogen, there is likely to be a relatively limited expression of the yield decline phenomena.
机译：在BSES糖业实验站的伯德在1994年成立的旋转实验，回到了甘蔗在1998年8月下旬的实验由六个史前治疗，其中三个连续用甘蔗既保留了垃圾，垃圾清除，并删除垃圾加熏蒸前立即返回甘蔗。其他三个治疗是其他农作物，牧草，或休耕的42个月休息。所有预先历史处理被分裂氮肥的四种速率 - 0，50公斤/公顷基底，基底50加种植经过130千克/公顷，在90天，和0基础加上180千克/公顷在90天。拍摄和秸秆的开发和维护，以及作物产量测定。有任何的场所及熏蒸持续甘蔗之间没有产量差异，但这些处理由大约30吨/公顷或26％产量超过连续甘蔗。有对氮肥无响应以下作物，休耕或熏蒸甘蔗预历史，但以下连续甘蔗和牧场预历史一个significantresponse。早芽的发育过程中建立了产量响应的基础。初始主枝条发育是独立可用的氮（土壤+肥料），但二次分蘖的由可利用的氮的强烈影响。此外，拍摄保持用增强的氮状态得到改善。断开前的历史和连续甘蔗之间的收率差从48％范围时，没有氮，在180公斤/公顷的最大氮速率施加到13％。有人建议，在与辐射，水和氮的高输入的系统中，有可能是一个相对有限的屈服下降现象表达。

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