不同给水负压对辣椒生长及水分利用效率的影响
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摘要
为筛选出南方地区辣椒(Capsicum annuumL.)生长最适宜的灌溉负压值,采用土壤盆栽试验的方法,选择2种典型菜园土壤(潮菜园土和红菜园土),研究3个给水负压(-5.0 kPa、-10.0 kPa和-15.0 kPa)对土壤水分含量、辣椒产量、累积耗水量和水分利用效率的影响,探讨负压灌溉下适宜辣椒生长发育的给水水平。结果表明,-5.0 kPa给水负压条件下,潮菜园土和红菜园土的相对含水量分别为61.6%和60.5%;辣椒产量潮菜园土256.0 g/pot,红菜园土141.7 g/pot,显著高于-10.0 kPa和-15.0 kPa处理。辣椒生长期(5月4日—7月21日)-5.0 kPa处理潮菜园土累积耗水量为21.5 dm3,显著大于-15.0 kPa处理,红菜园土为17.6 dm3,显著大于-10.0 kPa和-15.0 kPa处理;水分利用效率潮菜园土2.14 g/kg,红菜园土1.69 g/kg,显著高于-15.0 kPa处理。辣椒各生育期耗水强度,潮菜园土以开花座果期最大,-5.0 kPa处理为0.403 dm3/d,显著大于-15.0 kPa处理,红菜园土以结果期最大,-5.0 kPa处理为0.335 dm3/d,显著大于-10.0 kPa和-15.0 kPa处理。辣椒果长、果径和单果重,红菜园土以-5.0 kPa处理最优,潮菜园土以-10.0 kPa处理最优。综合辣椒产量和水分利用效率,潮菜园土和红菜园土以-5.0 kPa负压灌溉较为适宜。
In order to select a suitable negative pressure for the growth of pepper(Capsicum annuumL.) in south of China,two vegetable soils(alluvial soil and red soil) were collected and a pot experiment was conducted to investigate the effects of three levels of negative pressure(-5.0 kPa,-10.0 kPa and-15.0 kPa) on soil moisture,pepper yield,total water consumption and water use efficiency.The results showed that under the negative pressure condition of -5.0 kPa,the relative soil water content was 61.6% and 60.5%,the pepper yield was 256.0 g/pot and 141.7 g/pot in alluvial and red soil,respectively,which were significantly higher than those under-10.0 kPa and-15.0 kPa treatments.During the growth stage of pepper from May 4 to July 21,the total water consumption in alluvial soil was 21.5 dm3 under -5.0 kPa treatment,higher than that under-15.0 kPa treatment;while the value in red soil was 17.6 dm3 under-5.0 kPa and was greater than those under both-10.0 kPa and-15.0 kPa.The water use efficiency of pepper under-5.0 kPa treatment was 2.14 g/kg in alluvial soil and 1.69 g/kg in red soil,which were both higher than those under-15.0 kPa treatment.The water consumption intensity of pepper in alluvial soil was high at the blooming and fruit-setting stage,with a higher value of 0.403 dm3/d under-5.0 kPa than under-15.0 kPa treatment.As for red soil,the water consumption intensity was high at the fruiting stage,also with a higher value of 0.335 dm3/d under-5.0 kPa than under-10.0 kPa and-15.0 kPa treatments.The fruit length,diameter and single weight of pepper in red soil were the optimal under-5.0 kPa treatment,while in alluvial soil they were the best under-10.0 kPa treatment.In terms of pepper yield and water use efficiency,the irrigation level of -5.0 kPa is suitable for pepper in the two selected soils.
In order to select a suitable negative pressure for the growth of pepper(Capsicum annuumL.) in south of China,two vegetable soils(alluvial soil and red soil) were collected and a pot experiment was conducted to investigate the effects of three levels of negative pressure(-5.0 kPa,-10.0 kPa and-15.0 kPa) on soil moisture,pepper yield,total water consumption and water use efficiency.The results showed that under the negative pressure condition of -5.0 kPa,the relative soil water content was 61.6% and 60.5%,the pepper yield was 256.0 g/pot and 141.7 g/pot in alluvial and red soil,respectively,which were significantly higher than those under-10.0 kPa and-15.0 kPa treatments.During the growth stage of pepper from May 4 to July 21,the total water consumption in alluvial soil was 21.5 dm3 under -5.0 kPa treatment,higher than that under-15.0 kPa treatment;while the value in red soil was 17.6 dm3 under-5.0 kPa and was greater than those under both-10.0 kPa and-15.0 kPa.The water use efficiency of pepper under-5.0 kPa treatment was 2.14 g/kg in alluvial soil and 1.69 g/kg in red soil,which were both higher than those under-15.0 kPa treatment.The water consumption intensity of pepper in alluvial soil was high at the blooming and fruit-setting stage,with a higher value of 0.403 dm3/d under-5.0 kPa than under-15.0 kPa treatment.As for red soil,the water consumption intensity was high at the fruiting stage,also with a higher value of 0.335 dm3/d under-5.0 kPa than under-10.0 kPa and-15.0 kPa treatments.The fruit length,diameter and single weight of pepper in red soil were the optimal under-5.0 kPa treatment,while in alluvial soil they were the best under-10.0 kPa treatment.In terms of pepper yield and water use efficiency,the irrigation level of -5.0 kPa is suitable for pepper in the two selected soils.
引文
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[4]王世杰,张恒嘉,巴玉春,等.调亏灌溉对膜下滴灌辣椒生长及水分利用的影响[J].干旱地区农业研究,2018,36(3):31-38.Wang S J,Zhang H J,Ba Y C,et al.Effect of regulated deficit irrigation on growth and water use of pepper with mulched drip irrigation[J].Agricultural Research in the Arid Areas,2018,36(3):31-38.
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[10]Li Y,Wang L,Xue X,et al.Comparison of drip fertigation and negative pressure fertigation on soil water dynamics and water use efficiency of greenhouse tomato grown in the North China Plain[J].Agricultural Water Management,2017,184:1-8.
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[14]马艳华,任秀娟,杨慎骄,等.负压供水下水氮耦合对温室辣椒品质及产量的影响[J].灌溉排水学报,2017,36(5):17-20.Ma Y H,Ren X J,Yang S J,et al.Effect of fertigation by keeping irrigating water under negative pressure on quality and yield of pepper grown in greenhouse[J].Journal of Irrigation and Drainage,2017,36(5):17-20.
[15]李霞,解迎革,王国栋,等.日光温室内负水头灌溉条件下茄子生长及生理特性的研究[J].西北农林科技大学学报(自然科学版),2016,44(5):163-169.Li X,Xie Y G,Wang G D,et al.Growth and physiological characteristics of eggplant under negative hydraulic head irrigation in greenhouse[J].Journal of Northwest A&F University(Natural Science Edition),2016,44(5):163-169.
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[17]龙怀玉,刘振华,肖海强,等.应用于农业灌溉的负压调节装置[P].中国,CN103583315A,2014.Long H Y,Liu Z H,Xiao H Q,et al.A regulating device of negative pressure irrigation applied in agricultural irrigation[P].China,CN103583315A,2014.
[18]龙怀玉,雷秋良,张认连.应用于农业灌溉的恒负压灌水系统[P].中国,CN103548645A,2014.Long H Y,Lei Q L,Zhang R L.A irrigation system with constant negative pressure applied in agricultural irrigation[P].China,CN103548645A,2014.
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