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北京石油化工學(xué)院2026年研究生招生接收調(diào)劑公告

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金蟲(chóng) (小有名氣)

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[求助] 求助高手幫我精確翻譯下摘要

通過(guò)3年的大田試驗(yàn)，設(shè)置不同的氮素水平(0、75、150、300、450、600kg N hm-2)，分析了不同施氮量對(duì)滴灌加工番茄地上部生物量、氮累積量及氮累積用率動(dòng)態(tài)變化的影響。結(jié)果表明：滴灌加工番茄地上部生物量、氮累積量隨出苗后累積生理發(fā)育時(shí)間(PDT)的動(dòng)態(tài)變化符合S形曲線，氮素快速累積起始時(shí)間T1在出苗后累積PDT42-47d之間，較地上部生物量的快速累積起始時(shí)間T1早4-6個(gè)PDT，以300kg N hm-2處理的地上部生物量和氮累積量最多，其動(dòng)態(tài)累積特征參數(shù)的一致性較其它氮素水平高；滴灌加工番茄氮累積利用率(NAU)隨出苗后累積生理發(fā)育時(shí)間(PDT)的動(dòng)態(tài)亦呈S形曲線變化，施氮量與氮累積利用率并非呈正相關(guān)，高氮處理(450、600kg N hm-2)的氮累積利用率低于(75、150、300kg N hm-2)處理，但以300kg N hm-2處理的氮累積利用率最高；滴灌加工番茄瞬時(shí)氮利用率(NMUR)隨出苗后累積生理發(fā)育時(shí)間的動(dòng)態(tài)變化表現(xiàn)為先增加后降低的單峰曲線，其中以300kg N hm-2處理的氮素利用效率較其它氮素處理高。綜合分析表明：北疆地區(qū)滴灌加工番茄適宜施氮量為300kg N hm-2，但是，過(guò)量施氮不僅不會(huì)增加滴灌地上部生物量、氮累積量及氮累積利用率，而且會(huì)使加工番茄植株徒長(zhǎng)，造成營(yíng)養(yǎng)生長(zhǎng)與生殖生長(zhǎng)的失衡。因此，合理施氮對(duì)滴灌加工番茄高產(chǎn)、優(yōu)質(zhì)、高效栽培具有重要意義。

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1樓 2013-06-23 00:01:57

已閱關(guān)注TA 給TA發(fā)消息送TA紅花 TA的回帖

masikai

金蟲(chóng) (小有名氣)

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【答案】應(yīng)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.

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2樓2013-06-25 12:58:01