地下滴灌不同水量与播种方式下苜蓿种子产量构成因素的相关性分析

Effect of Subsurface Drip Irrigation on the Yield and Components of Alfalfa Seeds

【目的】为改变传统苜蓿制种模式中水资源浪费的现状。【方法】实验通过设置不同的水量与播种方式，研究地下滴灌对新牧1号杂花苜蓿种子产量及其构成因素的影响。【结果】（1）地下滴灌条件株高随着配水量的增加而增高，株高与单株种子产量呈正相关，R=0．449420，P〈0．01。（2）花序数／枝条（如）、豆荚数／花序（X3）籽粒数／豆荚（X4）与种子产量呈极显著正相关，相关系数分别为R=0．778275、R=0．830400、R=0．925693，P〈0．01。种子产量回归方程为：Y=-2．677＋0．025x2＋0．136X3＋1．712X4。（3）处理组合Bwl（40-80cm宽窄行播种，灌水量达相对田间持水量65％～80％）。【结论】单株种子产量最高为1．17g，并与其他处理存在极显著性差异（P〈0．01）。

[ Objective and Method] To change the current situation of water resources wasting during Alfalfa seed procution, the experiment studied the effect of subsurface drip irrigation on seed yield and components of medieago Medicago varia Martin. cv. Xinmu No. 1 by setting different row spacing and irrigation rate . [ Result and Couclusion]The following conclusion were drawn ： （ 1 ） As irrigation rate increased , height gradually increased. Height was positively correlated with seed yield （y）/plant （ R = 0. 449 420, P 〈 0.01 ）. （2） Racemes/shoot（ X2 ）, pods/racemes（ X3 ）, seeds/pod （ X4 ） and seed yield （Y） were positively correlated （ P 〈 0.01 ） with correlation coefficients of 0.778 , 0. 926 and 0. 830 respectively . The regression equation was Y = - 2. 677 ＋ 0.02 5 X2 ＋ 0. 136 X3 ＋ 1. 712X4. （3）The treatment combination of T3W1 has the highest seed yield/plant which is 1.17 g and it has quite significant difference compared with other treatments（ P 〈 0.01）.