Crop Water Requirement and Yield of Aerobic Rice Under Mulched Drip Irrigation in Eastern Inner Mongolia

doi:10.11924/j.issn.1000-6850.casb2021-0045

Abstract

Abstract:

It is a worldwide problem to improve the utilization rate of water resources and solve the shortage of agricultural water. How to reduce the irrigation water consumption and optimize the water consumption structure while ensuring the grain production capacity in the main rice producing areas in Inner Mongolia could be regarded as a research hotspot. Based on the principle of water balance, the experiment of aerobic rice under mulched drip irrigation was carried out in Jalaid Banner, eastern Inner Mongolia from May to September 2018- 2019. Taking the traditional rice transplanting mode as a reference, this paper explored the crop water requirements of mulched drip irrigation rice in different growth stages in typical planting areas of eastern Inner Mongolia, and analyzed the final yield and crop water requirement coefficient of rice under different irrigation methods. The results showed that the water requirement of rice under mulched drip irrigation was 608.4 mm in the whole growth period. When the soil moisture content was 85%-100% of the saturated water content in the growth stage, the yield was the highest. Water requirement was the minimum at seedling stage and the maximum at heading and filling stage. The maximum water consumption intensity was in the middle stage of jointing and booting, and the maximum water demand coefficient was at heading and filling stage in the whole growth period.

Key words: aerobic rice, drip irrigation under mulch, crop water requirement, water requirement coefficient

CLC Number:

S275.3

Liu Hu, Wang Jian, Abiyasi, Chen Gong, Gao Tianming, Zhao Zhiqiang, Xin Haixia. Crop Water Requirement and Yield of Aerobic Rice Under Mulched Drip Irrigation in Eastern Inner Mongolia[J]. Chinese Agricultural Science Bulletin, 2021, 37(29): 146-151.

Figures/Tables 9

References 14

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采样点	取样深度/cm	CEC/(cmol/kg)	盐分/%	pH	全氮/(g/kg)	碱解氮/(mg/kg)	速效磷/(mg/kg)	速效钾/(mg/kg)	有机质/(g/kg)
Ⅰ	15	1.15	0.31	7.5	1.3	40.5	15.7	107.1	29.4
Ⅰ	30	1.26	0.28	7.2	1.9	24	13.0	125.6	32.8
Ⅱ	15	1.42	0.31	7.3	2.1	24	10.7	118.7	27.7
Ⅱ	30	1.35	0.20	7.2	1.8	18	17.5	109.5	35.3

采样点	取样深度/cm	CEC/(cmol/kg)	盐分/%	pH	全氮/(g/kg)	碱解氮/(mg/kg)	速效磷/(mg/kg)	速效钾/(mg/kg)	有机质/(g/kg)
Ⅰ	15	1.15	0.31	7.5	1.3	40.5	15.7	107.1	29.4
Ⅰ	30	1.26	0.28	7.2	1.9	24	13.0	125.6	32.8
Ⅱ	15	1.42	0.31	7.3	2.1	24	10.7	118.7	27.7
Ⅱ	30	1.35	0.20	7.2	1.8	18	17.5	109.5	35.3

处理	处理编号	各阶段水分条件
处理	处理编号	播种	苗期	拔节	孕穗-开花	灌浆-乳熟
膜下滴灌	MD	80~100	85~100	85~100	85-100	70~100
无膜滴灌	DG	80~100	85~100	85~100	85-100	70~100
传统泡田	CK	—	—	—	—	—

处理	处理编号	各阶段水分条件
处理	处理编号	播种	苗期	拔节	孕穗-开花	灌浆-乳熟
膜下滴灌	MD	80~100	85~100	85~100	85-100	70~100
无膜滴灌	DG	80~100	85~100	85~100	85-100	70~100
传统泡田	CK	—	—	—	—	—

采样点	凋萎系数(V)/%	田间持水量(V)/%	饱和含水量(V)/%	可用水量/(cm/cm)	饱和导水率/(mm/hr)
I	14.4	28.2	46.2	0.13	12.99
II	17.6	32.3	47.3	0.14	8.23
平均	16	30.25	46.75	0.135	10.61