关键词: miRNAs, miRNAs

Abstract: In order to improve rain-fed farmland water condition, crop water use efficiency (WUE), achieve high and stable yield, the soil moisture and growth condition of sunflower and potato were studied in different furrow planting measures in north foot of Yinshan Mountain in Inner Mongolia. There are four treatments: ridge film mulching and furrow planting (RF), furrow planting (FP), ridge tillage, (RT) and flat planting (CK). The results showed that, different culture measures increased crop yield and the order was RF > FP > RT > CK, and the sunflower seed yield was 3372.4, 2861.2, 2828.0, 2477.9 kg/hm2, and 894.6, 383.4, 350.1 kg/hm2 were increased compared with CK, the increasing rate were 36.10%, 15.47% and 14.13%. The yield of potato were 27302.5, 26051.5, 25835.0, 25330.0 kg/hm2, and 1972.5, 721.5, 505.0 kg/hm2 were increased compared with CK, the increased rate was 7.78%, 2.85% and 2.00%. The soil temperature 10 cm below the surface was RF > FP > RT > CK in all growth stages in potato experiment and in late June to early August and after middle September in sunflower experiment. The soil temperature in sunflower changed in different stages may be for the sunflower growth and soil water content changing in different treatments. The accumulated temperature was RF > FP> RT > CK, and was increased 162.6℃?d, 80.6℃?d and 35.8℃?d in sunflower experiment, and was increased 228.7℃?d, 58.7℃?d and 48.6℃?d in potato experiment compared with the CK. The crops’ leaf area index increased then reduced in whole growth period and the sunflower’s maximum leaf area index appeared in about 100 days after seeding, the potato appeared in about 90 days after seeding. The sunflower’s leaf area index was RF > FP > RT > CK in whole growth period, and the potato’s leaf area index was RF > FP > CK > RT before 90 days after seeding. The water consumption was most in CK and lest in RF and the order was RF < FP < RT < CK. The WUE was increased with water consumption amount reducing and the WUE in different treatments was RF > FP > RT > CK. In conclusion, the sunflower and potato yield were increased obviously by using these three rain collection culture techniques and the best was ridge film mulching and furrow planting.