Economic effects and coupling models of water and fertilizer of rice cultivated in aerobic soil
He Jinyu1, Tian Juncang1,2,3
1.College of Civil and Hydraulic Engineering, Ningxia University, Yinchuan, Ningxia 750021, China; 2.Ningxia Research Center of Technology on Water-saving Irrigation and Water Resources Regulation, Yinchuan, Ningxia 750021, China; 3.Engineering Research Center for Efficient Utilization of Water Resources in Modern Agriculture in Arid Regions, Yinchuan, Ningxia 750021, China
Abstract：To probe the relations of water and fertilizer with the yield, the field experiment on the mo-del of water and fertilizer coupling of rice cultivated in aerobic soil by mulch drip irrigation was carried out by a current rotary combination design, and its application prospect was comparatively analyzed. The relation between irrigation quota, nitrogen, phosphorus and rice yields was in line with the ternary quadratic regression model under the tested soil by mulch drip irrigation. The regression coefficients of the first term, the second term and the water-nitrogen interaction term have extremely significant level. The roles of increasing yields of the three factors were in order as follows: irrigation quota> nitrogen> phosphorus. There was a highly positive correlation between the estimating yields calculated by the model and harvest yields, of which predictive accuracy was up to 99%. Thus the irrigation quota and fertilizer application with maximum yield and their maximum yields were calculated by the regression model. On the basis of this, the optimum schemes of water and fertilizer to achieve target yields were proposed. If target yields were 9 300-9 600 kg/hm2, the irrigation quota, nitrogen and phosphorus application were from 9 730-10 500 m3/hm2, 272-363 kg/hm2 and 136-147 kg/hm2, respectively. If the economic benefits were considered, the optimum irrigation quota, nitrogen and phosphorus application were 8 500-9 015 m3/hm2, 225-240 kg/hm2 and 90-120 kg/hm2, respectively. The results from the different planting patterns showed that the yields of rice cultivated in aerobic soil by mulch drip irrigation were hardly different from those by the irrigation after direct seeding, which has roughly the same production costs as the rice seedlings transplanting cultivation, but, of which water use efficiency was much higher than that of the other three planting patterns(about 1.06 kg/m3 on average). Compared with the conventional transplanting seedlings cultivation, the planting way to rice cultivated in aerobic soil by mulch drip irrigation saves about 50% water and about 30% fertilizer.
何进宇, 田军仓,,. 旱作水稻水肥耦合模型及经济效应[J]. 排灌机械工程学报, 2015, 33(8): 716-723.
He Jinyu, Tian Juncang,,. Economic effects and coupling models of water and fertilizer of rice cultivated in aerobic soil. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(8): 716-723.
[1]王兴盛.宁夏水稻[J].北方水稻,2007(1):19-22. Wang Xingsheng.Rice production in Ningxia[J].North Rice,2007(1):19-22.(in Chinese)[2]何文寿.宁夏植物营养与肥料研究现状与展望[J].农业科学研究,2013,34(1):54-60. He Wenshou.Research advances and prospects of plant nutrition and fertilizers in Ningxia[J].Journal of Agricultural Science,2013,34(1):54-60.(in Chinese)[3]田军仓,韩丙芳.膜上灌玉米水肥耦合模型及最佳组合方案研究[J].沈阳工业大学学报,2004,35(5/6):396-398. Tian Juncang,Han Bingfang.Model of coupling water with fertilizer upon aaize irrigated on plastic film and its optimum combination scheme[J].Journal of Shenyang Agricultural University,2004,35(5/6):396-398.(in Chinese)[4]Malone R W,Ma L,Heilman P,et al.Simulated management effect corn yield and tile-drainage nitrate loss[J].Geoderma,2007,140(3):272-283.[5]杨蕊菊,马忠明.水肥耦合对小麦/玉米带田产量及构成因素的影响[J].西北农业学报,2015,24(1):54-59. Yang Ruiju,Ma Zhongming.The effect of water and fertilizer coupling on yield and yield components of intercropped wheat/maize[J].Acta Agriculture Boreali-occidentalis Sinica,2015,24(1):54-59.(in Chinese)[6]尹光华,刘作新,李桂芳,等.辽西半干旱区春小麦氮磷水耦合产量效应研究[J].农业工程学报,2005,21(1):41-45. Yin Guanghua,Liu Zuoxin,Li Guifang,et al.Effect of nitrogen,phosphorus and water coupling on spring wheat yield in semi-arid areas of Western Liaoning Province[J].Transactions of the CSAE,2005,21(1):41-45.(in Chinese)[7]Li Zizhen,Li Weide,Li Wenlong.Dry-period irrigation and fertilizer application affect water use and yield of spring wheat in semi-arid regions[J].Agricultural Water Management,2004,65(2):133-143.[8]邢英英,张富仓,张燕,等.膜下滴灌水肥耦合促进番茄养分吸收及生长[J].农业工程学报,2014,30(21):70-80. Xing Yingying,Zhang Fucang,Zhang Yan,et al.Irrigation and fertilization coupling of drip irrigation under plastic film promotes tomato′s nutrient uptake and growth[J].Transactions of the CSAE,2014,30(21):70-80.(in Chinese)[9]韩丙芳,田军仓.膜侧灌甜菜水肥耦合产量效应研究[J].中国农村水利水电,2008(3):39-43. Han Bingfang,Tian Juncang.Study on the effect of coupling of water with fertilizer on beet yield irrigated from the side of plastic mulch[J].China Rural Water and Hydropower,2008(3):39-43.(in Chinese)[10]沈晖,田军仓,宋天华.水肥耦合对压砂地膜下滴灌甜瓜的产量效应研究[J].中国农村水利水电,2011(10):15-18. Shen Hui,Tian Juncang,Song Tianhua.Coupling effects of water and fertilizer on drip irrigation of melon under plastic mulches in sunada[J].China Rural Water and Hydropower,2011(10):15-18.(in Chinese)[11]马波,田军仓.膜下小管出流压砂地西瓜水肥耦合产量效应研究[J].节水灌溉,2009(10):6-12. Ma Bo,Tian Juncang.Study on production effect of water and fertilizer coupling on gravel mulched field waterme-lon with small pipe outflow irrigation under plastic film[J].Water Saving Irrigation,2009(10):6-12.(in Chinese)[12]郭松,刘声峰,于蓉,等.压砂地西瓜水肥耦合模型及优化组合方案[J].北方园艺,2013(17):8-11. Guo Song,Liu Shengfeng,Yu Rong,et al.Optimized combination scheme and water-fertilizer coupling model on watermelon in sand field[J].Northern Horticulture,2013(17):8-11.(in Chinese)
