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首页> 外文期刊>Paddy and Water Environment >Water and energy productivity of rice as influenced by duration of cultivars, dates of transplanting and irrigation regime in north-western India
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Water and energy productivity of rice as influenced by duration of cultivars, dates of transplanting and irrigation regime in north-western India

机译：水稻水和能源生产率受到品种持续时间的影响，印度西北部移植和灌溉制度的日期

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A field experiment was conducted to compare water productivity of short- and long-duration rice cultivars transplanted on different dates under variable irrigation regimes during 2012-2014. The experiment was laid out in split plot design keeping combinations of three dates of transplanting (15 June, 25 June and 5 July) and two cultivars (PR 115 and PR 118) in main plots and four irrigation regimes [irrigation at 1, 2 and 3days after infiltration of ponded water (DIPW) and continuous ponding (CP)] in subplots. Crop transplanted on June 15 and 25 produced statistically similar but significantly higher grain yield than July 5 transplanted crop. Grain yield increased to the tube of 17.2 and 15.6% under early transplanting on June 15 and 25 compared to July 5, respectively. However, amount of irrigation water applied decreased by 23.6 and 12.9cm for July 5 and June 25 transplanted crop compared to June 15 transplanted crop, respectively. Apparent crop water productivity (ACWP) and total crop water productivity (TCWP) were significantly higher in June 25 transplanted crop than in June 15 and July 5. Similarly, energy use efficiency and energy productivity were also the highest in June 25 transplanted crops followed by June 15 and the least in July 5. Significantly higher grain yield was observed in cultivar PR 118 as compared to PR 115 under June transplanting dates (15 and 25 June). However, reverse trend was observed in late transplanting on July 5. Significant reduction in grain yield of PR 118 was recorded with delay in transplanting from June 25 to July 5, but PR 115 performed statistically similarly under all the three dates of transplanting. Irrigation water applied was 9.4% higher in PR 118 as compared to PR 115. ACWP and TCWP were 7.9 and 9.2% higher in PR 115 than in PR 118, respectively. ACWP and TCWP of PR 115 increased with delay in transplanting from June 15 to July 5, but differences between June 25 and July 5 remained nonsignificant. However, in the case of PR 118, ACWP and TCWP remained statistically similar between June 15 and June 25 and thereafter decreased significantly with delay in transplanting to July 5. Rice grain yield did not show any significant effect on irrigation application frequency, i.e. irrigate continuously or applied water at 1, 2 and 3 DIPW. However, 5.9, 15.2 and 23.5% higher irrigation water applied was recorded in continuous ponding than in irrigation application at 1, 2, and 3 DIPW, respectively. Apparent water productivity and energy use efficiency were 5.9 and 7.0, 15.3 and 13.0, and 19.8 and 23.0% higher in irrigation scheduling at 1, 2 and 3 DIPW than in CP, respectively.
机译：2012-2014年，在不同灌溉制度下，进行了一项田间试验，以比较不同日期移栽的长短期水稻品种的水分生产力。试验采用裂区设计，将三个移栽日期（6月15日、6月25日和7月5日）和两个品种（PR 115和PR 118）在主地块和四种灌溉制度（积水入渗后1天、2天和3天的灌溉和连续积水（CP））的组合保留在子地块中。6月15日和25日移栽的作物产量在统计学上相似，但显著高于7月5日移栽的作物。与7月5日相比，在6月15日和25日提前移栽的情况下，产量分别提高到17.2%和15.6%。然而，与6月15日移栽作物相比，7月5日和6月25日移栽作物的灌溉水量分别减少了23.6和12.9厘米。6月25日移栽作物的表观作物水分生产力（ACWP）和总作物水分生产力（TCWP）显著高于6月15日和7月5日。同样，6月25日移栽作物的能源利用效率和能源生产率最高，其次是6月15日，7月5日最低。在6月移栽期（6月15日和25日），品种PR118的籽粒产量显著高于PR115。然而，在7月5日晚移栽中观察到相反的趋势。在6月25日至7月5日的移栽延迟期间，PR118的粮食产量显著下降，但在所有三个移栽日期下，PR115的表现在统计学上相似。PR118的灌溉水量比PR115高9.4%。PR115的ACWP和TCWP分别比PR118高7.9%和9.2%。从6月15日到7月5日，PR115的ACWP和TCWP随着移植延迟而增加，但6月25日和7月5日之间的差异仍然不显著。然而，在PR118的病例中，ACWP和TCWP在6月15日和6月25日之间在统计学上保持相似，此后随着移植延迟到7月5日，ACWP和TCWP显著降低。水稻产量对灌溉施用频率没有任何显著影响，即连续灌溉或在1、2和3 DIPW下施用水。然而，在1、2和3 DIPW条件下，连续蓄水比灌溉分别高5.9%、15.2%和23.5%。在1、2和3 DIPW的灌溉计划中，表观水分生产率和能源利用效率分别比CP高5.9%和7.0%，15.3%和13.0%，19.8%和23.0%。

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