减氮覆膜对黄土旱塬小麦产量及养分吸收利用的影响

刘凯,谢英荷,李廷亮,马红梅,张奇茹,姜丽伟,曹静,邵靖琳

Effects of Nitrogen Reduction and Film Mulching on Wheat Yield and Nutrient Absorption and Utilization in Loess Plateau

LIU Kai,XIE YingHe,LI TingLiang,MA HongMei,ZHANG QiRu,JIANG LiWei,CAO Jing,SHAO JingLin

表1 冬小麦试验期间降水分布情况

Table 1 The distribution characteristics of precipitation during the experiment period ofwinter wheat (mm)

年度 Year	夏闲期 Summer fallow period					生育时期 Growth period									周年降雨量 Annual rainfall
年度 Year	Jun	Jul	Aug	Sep	Total	Oct	Nov	Dec	Jan	Feb	Mar	Apr	May	Total	周年降雨量 Annual rainfall
2012—2013	13.8	150.5	114.9	55.1	334.3	11.6	7.3	4.1	1.2	3.3	4.7	15.4	67.8	115.4	449.7
2013—2014	27.9	312.8	66.6	57.4	464.7	36.4	4.3	0	0	12	18.1	52.1	63.7	186.6	651.3
2014—2015	75.7	61.8	126.9	148.9	413.3	10.9	6.2	0	4.2	3.3	0.5	38.6	32.2	95.9	509.2
2015—2016	22.2	51.1	15.5	51.5	140.3	49.9	49	0.8	4.2	1.8	2.3	21.6	54.2	183.8	324.1
2016—2017	61.8	248.3	31	16.5	357.6	50.1	10.8	6.2	1.2	4.8	4.1	37.7	31.8	146.7	504.3
2017—2018	87.4	148.3	66.8	17.3	319.8	73.2	1.3	3.4	5.2	0	21.2	67.1	29.8	201.2	521.0
2018—2019	46.4	62.3	0.5	66	175.2	0.1	23.4	1.4	2.8	6.4	0.4	33.6	0.8	68.9	244.1