栽培因素对北方粳稻产量及米质的影响(Ⅳ)——插秧株数对产量及米质的影响

Cultivated factor has the influence on the yield and quality of North Japonica riceⅣ——the number of plant has the influence on the yield and quality

2002～2003年开展插秧株数对北方粳稻产量及米质影响试验,结果表明,在30cm×20cm密度条件下,1穴内每增加1株苗,株高降低1.5cm;叶片减少0.3个;有效分蘖略有增加。每穴插2～3株苗时产量最高,1、4株次之,5株最低。穴插3株苗左右时加工品质最好,外观品质是随插秧株数的增加而变劣。除插1株时稻米中蛋白质含量有所增加外,其他处理的直链淀粉和蛋白质含量没有多大区别。

Carry on the test from 2002 to 2003 about plant of transplant rice seedlings had the effect to the yield and quality of the North Japonica rice, the result indicate that under the density of 30 cm × 20 cm, when insert 1 trunk in 1 hole, plant height can reduce 1.5 cm, leaves reduce 0.3, effective tillering increase a bit. When insert 2～3 trunk in 1 hole the yield is the highest, 1 or 4 trunk in 1 hole is lower, 5 trunk in 1 hole is lowest. When insert 3 trunk in 1 hole the artifactitious quality is best, surface quality is become bad along with the trunk is increase. Protein in rice was increase expect 1 trunk in 1 hole, amylose and protein of the other precept had little difference.