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Production and profit of current and future dairy systems using differing nitrogen leaching mitigation methods: the Pastoral 21 experience in Waikato
New Zealand Journal of Agricultural Research ( IF 1.8 ) Pub Date : 2019-02-20 , DOI: 10.1080/00288233.2019.1577276
Dave A. Clark 1 , Kevin A. Macdonald 1 , Chris B. Glassey 1 , Chris G. Roach 1 , Sharon L. Woodward 1 , Wendy M. Griffiths 1 , Mark B. Neal 1 , Mark A. Shepherd 2
Affiliation  

ABSTRACT The aim of the study was to determine if existing technologies could reduce nitrate leaching by 50%; while maintaining high levels of milk production and profitability. One farmlet, typical of the Waikato (‘CURRENT’) was stocked at 3.2 cows/ha and compared with a farmlet stocked at 2.6 cows/ha (‘FUTURE’), focusing on higher cow production through the use of higher genetic merit cows, lower N fertiliser usage and removing cows from pasture (to a stand-off pad) during critical N leaching periods. The mitigation methods employed on the FUTURE farmlet reduced N leaching by 43% but meant the FUTURE farmlet was more expensive to run than the CURRENT (Control) farmlet. Although cows on the FUTURE farmlet each produced 68 kg more milksolids, production per hectare was 50 kg lower. Thus, the FUTURE farmlet yielded on average $279/ha/yr less profit than the CURRENT farmlet.

中文翻译:

使用不同氮浸出缓解方法的当前和未来乳品系统的生产和利润:怀卡托的 Pastoral 21 经验

摘要 本研究的目的是确定现有技术是否可以减少 50% 的硝酸盐浸出;同时保持高水平的牛奶产量和盈利能力。一个典型的怀卡托农场(“当前”)的存栏量为 3.2 头奶牛/公顷,而与一个农场的存栏量为 2.6 头/公顷(“未来”)相比,重点是通过使用更高遗传价值的奶牛来提高奶牛产量,减少氮肥的使用,并在关键的氮浸出期间将奶牛从牧场(到隔离垫)移走。FUTURE 农场采用的缓解方法将 N 浸出减少了 43%,但这意味着 FUTURE 农场的运行成本高于 CURRENT(对照)农场。虽然 FUTURE 农场的奶牛每头多生产 68 公斤乳固体,但每公顷的产量低 50 公斤。因此,
更新日期:2019-02-20
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