不同沟灌模式对甜椒生长和产量的调控效应

试验研究了交替隔沟灌溉(AFI)、常规沟灌(CFI)、固定隔沟灌溉(FFI)3种灌溉模式下甜椒植株形态变化、水分利用效率、产量及其构成因素。结果表明:(1)采收期末CFI、AFI、FFI处理平均株高分别为69.3 cm、63.6 cm和52.2 cm,差异达显著水平(P0.05);前期AFI处理株高增长量小于CFI处理,后期增长量逐渐增加且大于CFI处理。(2)整个生育期AFI处理径粗基本最大,最大值为1.38 cm。(3)采收期AFI与CFI和FFI处理叶面积指数差异极其显著,FFI和CFI处理差异达显著水平。(4)全生育期AFI主根长最长,为6.36 cm,AFI主根粗和根冠比介于CFI和FFI之间。(5)分析产量水平水分利用效率,AFI处理比CFI和FFI高46%和52%,分析群体水平水分利用效率,AFI处理比CFI和FFI高41%和38%。(6)全生育期同一水分梯度下,AFI处理产量最高,为62386.1 kg·hm-2,比CFI和FFI处理产量增加4 447 kg·hm-2和20 973 kg·hm-2,各处理间产量差异达显著水平。

Regulating effect of different furrow irrigation models on growth and yield of Capsicum

Under three irrigation models as alternative interval furrow irrigation(AFI), conventional furrow irrigation(CFI) and fixed interval furrow irrigation(FFI), has researched the change of the plant morphology, water use efficiency yield and its component factor of Capsicum, respectively. The results showed that: (1) The average plant heights in final harvest stage were 69.3 cm, 63.6 cm and 52.2 cm, respectively for three treatments as CFI, AFI and FFI,the difference was significant (P<0.05); In earlier stage, the increase of plant height of AFI was less than CFI, but in later stages, the increase of plant height was greater than CFI. (2) The stem-diameter was the largest under AFI in whole growth period, the maximum was 1.38 cm. (3) The difference of leaf area index in harvest stage was extremely significant between AFI with CFI and FFI, the difference of FFI and CFI was significant. (4) The main root length of AFI was the longest, which was 6.36 cm, and the taproot thick and root-shoot ratio of AFI were between CFI and FFI. (5) Analysis of the yield level, AFI was higher than CFI and FFI 46% and 52%, for the water use efficiency of group level, AFI was higher than CFI and FFI 41% and 38%. (6) At the same moisture gradient in whole growth period, the yield of AFI treatment was the highest, which was 62 386.1 kg·hm^-2, the yield was increased than CFI and FFI 4 447 kg·hm^-2 and 20 973 kg·hm^-2, also the difference was significant for each treatment.