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【目的】研究滴灌量对冬小麦干物质积累和转运特征的影响。【方法】在大田滴灌条件下,设置3 150(W_1)、3 900(W_2)、4 650(W_3)和5 400 m~3/hm~2(W_4),对照滴灌量为0(CK)共5种不同处理,研究不同滴灌量对冬小麦叶面积指数(LAI)、干物质积累、转运及产量的影响。【结果】随着滴灌量的增加,各处理冬小麦的LAI和干物质均呈W_3>W_4>W_2>W_1>CK的变化规律;干物质快增期出现在拔节后4~55 d,快增期持续时间(△t)为35~50 d,最大积累速率(V_m)为0.043~0.075 mg/(株·d);花前同化物转运量呈“先增后降”的趋势,花后同化物转运量呈增加趋势,但花前、花后同化物转运总量以W_3最大为1.574 g/株。产量最高为8602.41 kg/hm~2(W_3处理),分别较W_1、W_2、W_4和CK增产12.41%、2.77%、1.07%和33.00%。【结论】冬小麦全生育期适宜的滴灌量为4 650 m~3/hm~2。
【Objective】 The purpose of this study was to investigate the effects of drip irrigation on dry matter accumulation and transport characteristics of winter wheat. 【Method】 Under the condition of drip irrigation, 3 150 W 3, 3 650 W 4 and 5 400 m 3 / hm 2 were set up, and the control drip irrigation was 0 CK. Five different treatments were used to study the effects of drip irrigation on leaf area index (LAI), dry matter accumulation, translocation and yield of winter wheat. 【Result】 With the increase of drip irrigation, LAI and dry matter content of winter wheat showed W 3> W 4> W 2> W 1> CK. The rapid increase of dry matter occurred 4 ~ 55 days after jointing, The maximum accumulation rate (V_m) was 0.043 ~ 0.075 mg / (plant · d) for 35 ~ 50 days and the trend of " The amount of assimilates translocated increased, but the total amount of assimilate translocated before and after anthesis was 1.574 g / plant in W_3. The highest yield was 8602.41 kg / hm ~ 2 (W_3 treatment), which increased by 12.41%, 2.77%, 1.07% and 33.00% respectively than W_1, W_2, W_4 and CK. 【Conclusion】 The optimum amount of drip irrigation during the whole growth period of winter wheat was 4 650 m ~ 3 / hm ~ 2.