矮壮素对番茄秧苗质量及果实产量的影响

番茄(品种‘西农72-4’)电热温床育苗,二叶期分苗,三叶期及四叶期各喷矮壮素(CCC)一次,浓度分0,0.05％,0.10％,0.20％及0.40％五个处理。结果表明,0.05％～0.40％CCC均使苗高降低,单株叶面积缩壮小,叶片增厚,叶形变长。0.10％CCC区茎粗/株高比值及全株干重大,苗指数最高。对照壮苗指数最低。0.40％CCC区茎粗、叶数、叶面积和全株干重均最低,壮苗指数与对照相近。CCC对番茄早期产量和总产量影响不大。

Effects of CCC on Transplant Quality and Fruit Yield of Tomato

Seedlings of tomato (Lycopercicon esculentum) cv. Xinong 72-4, raised in electric frame, were transplanted in a plastic green house at the 2 ture leaf stage,and sprayed with CCC (chlormequat) at 0.05%,0.1%,0.2% or 0.4% at the 3 true leaf stage and at the 4 ture leaf stage respectively. The results showed that treatment with CCC at 0.1% gave the best result in transplant quality, short stocky plants with a good root system were produced, and the treated plants also had high dry matter and seedling index. All treatments reduced plant height and leaf area but increased leaf thickness in relation to the water-treated control, this trend is accompanied by the increase of CCC concentration. The early and total yield of fruits treated with CCC were similar to those of water-treated control plants.