新疆农业科学2013，Vol.50Issue(3)：433-439,7.DOI:10.6048/j.issn.1001-4330.2013.03.007
不同施氮水平对膜下滴灌水稻干物质积累和养分吸收规律的影响
Effects of Nitrogen Rates on Dry Matter Accumulation and Nutrient Absorption of Rice under Film Mulch with Drip Irrigation
摘要
Abstract
[Objective] The paper aimed to study dry matter accumulation dynamics and nutrient absorption under film mulch with drip irrigation. [ Method] Rice T -04 was used as experimental material and Logistic equation regression analysis was applied to study N rate effects on dry matter accumulation dynamics and nutrient absorption under film mulch with drip irrigation. Five N application levels ( 0, 210, 300, 390, 480 kg/hm2) was designed for the study. [Result] The result showed that dry matter and nutrient absorption dynamic could be described by Logistic equation, accelerated accumulation period of rice dry matter and N, P, K uptake was at 66. 7 - 99. 5 d, 56. 0 - 88.1d, 68. 9 - 105. 2 d, 61. 6 - 95. 6 d after seedlings emergence, respectively. With the increase of N dosage, the maximum accumulation amount and the maximum rates of dry matter and N, P, K were gradually increased, while the accelerated accumulation period was slowly reduced. The same rhythmicity of dry matter and N, P, K was showed from the beginning to the end: the accelerated accumulation period of N was the earliest, K was the second, dry matter was the third and P was the latest. N dosage of 390 kg/hm2 showed the largest accumulation rates of dry matter and N, P and K. It was suggested that overuse of was not helpful to rice growth and nutrition uptake. Compared with flood irrigation treatment, the largest accumulation rates of rice under film mulch with drip irrigation was significantly bigger. The accelerated accumulation period was shorter than film mulch with drip irrigation, but there were no significant differences of P and K between the two cultivation modes.关键词
水稻/膜下滴灌/养分吸收/干物质积累/logisticKey words
rice/ film mulch with drip irrigation/ nutrient absorption/ dry matter accumulation/ logistic分类
农业科技引用本文复制引用
朱齐超,朱金龙,危常州,宁小雄,李美宁,赵红华,张书捷..不同施氮水平对膜下滴灌水稻干物质积累和养分吸收规律的影响[J].新疆农业科学,2013,50(3):433-439,7.基金项目
国家"863"计划项目(2011AA100508) （2011AA100508）
新疆生产建设兵团杰出人才基金项目(2011CD004) （2011CD004）
