Xu Ji Kun, Yu Zhen Wen, Shi Yu, Zhao Jun Ye, Wang Xi Zhi, Wang Yu Qiu
College of Agronomy, Shandong Agricultural University/Ministry of Agriculture Key Laboratory of Crop Ecophysiology and Far-ming System, Tai'an 271018, Shangdong, China.
Institute of Agricultural Information, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Ying Yong Sheng Tai Xue Bao. 2017 Nov;28(11):3599-3609. doi: 10.13287/j.1001-9332.201711.022.
A two-year field experiment was conducted in 2014-2015 and 2015-2016 wheat growing seasons to study the effects of micro-sprinkling hose length and width on field water condition, and flag leaf chlorophyll fluorescence characteristics in different sampling districts (D to D along with the hose laying direction). Six micro-sprinkling hose treatments were set: 60 m (T), 80 m (T) and 100 m (T) lengths under 65 mm width; 60 m (T), 80 m (T) and 100 m (T) lengths under 80 mm width. The results showed that after irrigation at jointing, the Christiansen uniformity coefficient (C) of T was significantly higher than T and T under 65 mm hose width. Under 80 mm hose width, T and T had the highest C compared to T. After irrigation at anthesis, the C showed T>T>T under 65 mm hose width, and T>T>T under 80 mm hose width. Under 65 mm hose width, the average relative soil water content of 0-40 cm soil layers after irrigation at anthesis, flag leaf Φ, NPQ and ETR at 20 and 30 d after anthesis and the grain yield of different sampling district did not differ in T; T showed the order of D, D>D>D>D; T showed D, D>D>D>D, D. The average Φ, NPQ and ETR at 20 and 30 d after anthesis, and the average dry matter at maturity of different sampling districts were presented as T>T, T. Under 85 mm hose width, no significant differences were observed in the average relative soil water content of 0-40 cm soil layers after irrigation at ahthesis, flag leaf Φ, NPQ and ETR at 20 and 30 d after anthesis and the grain yield of different sampling districts in T; in T, the indexes mentioned above in D, D and D sampling districts were significantly higher than those in D and D; in T, the decreasing order was D, D, D>D>D>T. The average Φ, NPQ and ETR at 20 and 30 d after anthesis, and the average dry matter at maturity of different districts showed the order of T, T>T. The ave-rage grain yield and water use efficiency of T, T and T were significantly higher than those in T, T and T, T and T had a better irrigation benefit than T. Under this experimental condition, T treatment under 65 mm hose width, T treatment under 80 mm hose width were the most recommendable treatments considering high yield and water saving, and T treatment was also recommendable under 80 mm hose width.
在2014 - 2015年和2015 - 2016年小麦生长季进行了为期两年的田间试验，以研究微喷带长度和宽度对田间水分状况以及不同采样区（沿喷带铺设方向从D到D）旗叶叶绿素荧光特性的影响。设置了6种微喷带处理：65毫米宽度下，长度为60米（T）、80米（T）和100米（T）；80毫米宽度下，长度为60米（T）、80米（T）和100米（T）。结果表明，拔节期灌溉后，65毫米喷带宽度下T的克里斯琴森均匀系数（C）显著高于T和T。80毫米喷带宽度下，与T相比T和T的C最高。开花期灌溉后，65毫米喷带宽度下C表现为T>T>T，80毫米喷带宽度下为T>T>T。65毫米喷带宽度下，开花期灌溉后0 - 40厘米土层平均相对土壤含水量、开花后20天和30天旗叶的Φ、NPQ和ETR以及不同采样区的籽粒产量在T中无差异；T表现为D、D>D>D>D；T表现为D、D>D>D>D、D。开花后20天和30天不同采样区的平均Φ、NPQ和ETR以及成熟期平均干物质表现为T>T、T。85毫米喷带宽度下，开花期灌溉后0 - 40厘米土层平均相对土壤含水量、开花后20天和30天旗叶的Φ、NPQ和ETR以及不同采样区的籽粒产量在T中无显著差异；T中，上述指标在D、D和D采样区显著高于D和D；T中，递减顺序为D、D、D>D>D>T。开花后20天和30天不同区的平均Φ、NPQ和ETR以及成熟期平均干物质表现为T、T>T。T、T和T的平均籽粒产量和水分利用效率显著高于T、T和T，T和T的灌溉效益优于T。在该试验条件下，考虑到高产和节水，65毫米喷带宽度下的T处理、80毫米喷带宽度下的T处理是最值得推荐的处理，80毫米喷带宽度下的T处理也值得推荐。
