[Effects of soil covering on solar greenhouse pepper water use efficiency and soil nitrate N and available phosphorus contents].
A greenhouse study on the effects of soil covering on pepper (Capsicum anmuum L.) water use efficiency and soil nitrate and available phosphorus contents showed that straw mulch + plastic film mulch could get the highest pepper yield water use efficiency (33.04 kg . m(-3)) and economic water use efficiency (50.22 yuan . m(-3)), followed by plastic film mulch, with the two parameters being 18.81 kg . m(-3) and 28.57 yuan . m(-3), respectively. Significant differences of nitrate N content in 0-20 cm soil layer were observed among different treatments. The control had the highest nitrate N content (50.33 mg . kg(-1)), followed by straw mulch (31.98 mg . kg(-1)) and straw + plastic film mulch (31.96 mg . kg(-1)), and plastic film mulch and applying water preserving agent. Compared with the control, soil covering could increase the nitrate N use efficiency of pepper, and decrease the accumulation of nitrate N in plough layer. In 0-20 cm soil layer, treatment plastic film mulch had the lowest available phosphorus content (0.72 mg . kg(-3)), and the second (0. 92 mg . kg(-1)) was the treatment straw + plastic film mulch. Treatments straw + plastic film mulch and plastic film mulch could increase pepper fruit yield and fertilizer use efficiency, and decrease fertilizer loss.
Zhou
Mao-juan
MJ
College of Resource and Environmental Science, Northwest A & F University, Yangling 712100, Shaanxi, China. zmj791026@126.com
Liang
Yin-li
YL
Chen
Jia-rui
JR
Xiong
Ya-mei
YM
Wei
Ze-xiu
ZX
D000383:Agriculture / Q000379:methods; D002212:Capsicum / Q000254:growth & development / Q000378:metabolism*; D004780:Environment, Controlled; D008834:Microclimate; D009566:Nitrates / Q000032:analysis / Q000737:chemistry; D009584:Nitrogen / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis*; D012987:Soil / Q000032:analysis*; D014867:Water / Q000378:metabolism*
D009566:Nitrates; D012987:Soil; D014867:Water; D010758:Phosphorus; D009584:Nitrogen