CAJ | 학술논문

试验主要研究在西北干旱地区膜下滴灌条件下,不同水势处理对干制辣椒产量和水分利用效率的影响,从而确定适合该地区的辣椒滴灌控水下限.试验根据滴头下25 cm深处土壤的基质势设置5个控水下限:-10 kPa、-20 kPa、-30 kPa、-40 kPa和-50 kPa,测量的指标主要有叶面积、株高、土壤水分和产量等.试验结果表明,以-30 kPa为灌水下限的处理具有较高的叶面积指数、株高、最高的辣椒产量和水分利用效率.而控水下限过高和过低均会影响产量.因此在西北干旱地区膜下滴灌条件下,建议干制辣椒的控水下限为-30 kPa.
시험주요연구재서북간한지구막하적관조건하,불동수세처리대간제랄초산량화수분이용효솔적영향,종이학정괄합해지구적랄초적관공수하한.시험근거적두하25 cm심처토양적기질세설치5개공수하한:-10 kPa、-20 kPa、-30 kPa、-40 kPa화-50 kPa,측량적지표주요유협면적、주고、토양수분화산량등.시험결과표명,이-30 kPa위관수하한적처리구유교고적협면적지수、주고、최고적랄초산량화수분이용효솔.이공수하한과고화과저균회영향산량.인차재서북간한지구막하적관조건하,건의간제랄초적공수하한위-30 kPa.
A field experiment was carried out to compare the effects of different soil water potential on yield and water use efficiency of pepper under mulched drip irrigation condition to determine optimal water potential for pepper growth in the arid areas in Northwest China.Five treatments were evaluated based the soil potentials at 25 cm under the ground,they are -10 kPa,-20 kPa,-30 kPa,-40 kPa and -50 kPa.Pepper leaf area,plant height,soil water content and yield were measured.Results showed that pepper yield and water use efficiency are highest,and leaf area index and plant height are similar for the treatment with a potential threshold of -30 kPa as compared to other treatments.Higher or lower potential thresholds will limit plant yield and water use efficiency.Therefore,we recommend -30 kPa as the irrigation threshold for pepper cultivation under mulched drip irrigation in arid areas in the Northwest China.