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wx860910金虫 (小有名气)
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[求助]
求助高手帮我精确翻译下摘要
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| 通过3年的大田试验，设置不同的氮素水平(0、75、150、300、450、600kg N hm-2)，分析了不同施氮量对滴灌加工番茄地上部生物量、氮累积量及氮累积用率动态变化的影响。结果表明：滴灌加工番茄地上部生物量、氮累积量随出苗后累积生理发育时间(PDT)的动态变化符合S形曲线，氮素快速累积起始时间T1在出苗后累积PDT42-47d之间，较地上部生物量的快速累积起始时间T1早4-6个PDT，以300kg N hm-2处理的地上部生物量和氮累积量最多，其动态累积特征参数的一致性较其它氮素水平高；滴灌加工番茄氮累积利用率(NAU)随出苗后累积生理发育时间(PDT)的动态亦呈S形曲线变化，施氮量与氮累积利用率并非呈正相关，高氮处理(450、600kg N hm-2)的氮累积利用率低于(75、150、300kg N hm-2)处理，但以300kg N hm-2处理的氮累积利用率最高；滴灌加工番茄瞬时氮利用率(NMUR)随出苗后累积生理发育时间的动态变化表现为先增加后降低的单峰曲线，其中以300kg N hm-2处理的氮素利用效率较其它氮素处理高。综合分析表明：北疆地区滴灌加工番茄适宜施氮量为300kg N hm-2，但是，过量施氮不仅不会增加滴灌地上部生物量、氮累积量及氮累积利用率，而且会使加工番茄植株徒长，造成营养生长与生殖生长的失衡。因此，合理施氮对滴灌加工番茄高产、优质、高效栽培具有重要意义。 |
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【答案】应助回帖
| Through the field test of 3 years, set different nitrogen levels (0, 75, 150, 300, 450, 600kg N hm-2), analyzes the different amount of nitrogen on biomass, processing tomato with drip irrigation and nitrogen accumulation and nitrogen accumulation rate of dynamic effects. The results show that: drip irrigation, processing tomato shoot biomass, nitrogen accumulation with after emergence cumulative physiological development time (PDT) of the dynamic changes in accordance with S curve between nitrogen, rapid accumulation of T1 PDT42-47d in the start time accumulated after emergence, the aboveground biomass of the rapid accumulation of starting time T1 as early as 4-6 PDT, 300kg N hm-2 treatment of aboveground biomass and N accumulation amount is maximum, the consistency of dynamic characteristic parameters of nitrogen accumulation than other high level of processing tomato in drip irrigation; nitrogen accumulation utilization rate (NAU) after the emergence of accumulation with physiological development time (PDT) dynamic also appeared in S curve, the amount of nitrogen fertilizer and nitrogen accumulation and utilization there is not a positive correlation between, the high nitrogen treatment (600kg 450, N hm-2) accumulated N utilization rate lower than (75, 150, 300kg N hm-2), but 300kg N hm-2 accumulated N utilization efficiency is highest; Processing Tomato in drip irrigation instantaneous nitrogen use efficiency (NMUR) dynamic changes of physiological development time with the accumulated after emergence showed a single peak curve first increased and then decreased with nitrogen, 300kg N hm-2 use efficiency than other nitrogen treatment. Comprehensive analysis shows that: Processing Tomato with drip irrigation in appropriate amount of nitrogen fertilizer is 300kg N hm-2, however, excessive N does not increase a drip aboveground biomass, nitrogen accumulation and nitrogen accumulation and utilization, but also make the processing tomato plant growth, cause imbalance of vegetative growth and reproductive growth. Therefore, reasonable nitrogen yield of Processing Tomato under drip irrigation, high quality, efficient cultivation. |
2楼2013-06-25 12:58:01