河北中东部地区青贮玉米荧保素拌种效果研究

为探讨河北中东部地区青贮玉米种植中应用荧保素(Ⅰ型荧光假单胞菌)拌种的可行性,分别在河北唐山地区以沃玉3为试验材料、在沧州地区以中科11为试验材料,应用荧保素拌种与未拌种对照进行田间比较试验,测定了玉米的农艺性状、根系性状、产量性状,分析了荧保素拌种对青贮玉米生物产量与经济效益的影响。结果表明:唐山地区沃玉3用荧保素拌种时,鲜重产量为55695 kg/hm^2,干重产量为17475 kg/hm^2,干物质率为31.38%,未拌种对照鲜重产量为50235 kg/hm^2,干重产量为16532 kg/hm^2,干物质率为32.91%,用荧保素拌种较未拌种对照鲜重增产10.87%,干重增产5.70%,平均每公顷增收约1747元;沧州地区中科11用荧保素拌种,鲜重产量为39585 kg/hm^2,干重产量为13241 kg/hm^2,干物质率为33.45%,对照鲜重产量为36180 kg/hm^2,干重产量为11812 kg/hm^2,干物质率为32.65%,用荧保素拌种较对照鲜重增加9.41%,干重增加12.10%,平均每公顷增收约1089元,经济效益均显著提高(P<0.05)。说明荧保素拌种经济效益显著,可以在河北中东部地区推广应用。

唐山地区青贮玉米种植中荧保素应用技术研究

为探索唐山生态类型区青贮玉米种植中荧保素拌种技术应用的可行性,以沃玉3为材料,通过田间比较试验,研究了荧保素对青贮玉米生物产量与经济效益的影响。结果表明,荧保素拌种处理的鲜生物产量55 695kg/hm^2,干生物产量17 472 kg/hm^2,干物质率31. 37%,对照鲜生物产量50 235 kg/hm^2,干生物产量16 532kg/hm^2,干物质率32. 91%,拌种较对照鲜生物量增产10. 86%,干生物量增产5. 71%,平均每公顷增收约1750元,经济效益显著提高。建议在唐山生态类型区青贮玉米种植中推广应用荧保素拌种技术。

The Protective Role of Xanthophyll Cycle in Resurrection Angiosperm Boea hygrometrica During Dehydration and Rehydration

The protective role of xanthophyll cycle in resurrection angiosperm Boea hygrometrica (Bunge) R.Br. was investigated by analysis of the changes of chlorophyll fluorescence and xanthophyll cycle components in response to dehydration and rehydration in detached leaves under very weak light condition (3 mumol photons.m(-2).s(-1)) and in the dark. With declines in the values of PSII photochemical efficiency (Fv/Fm), PSII actual quantum yield (Phi(PSII)), photochemical quenching (qP) and non-photochemical quenching (NPQ) during dehydration, zeaxanthin significantly increased in control Boea leaves under very weak light condition, while no zeaxanthin accumulation was detected in Boea leaves treated with dithiothreitol (DTT) and Boea leaves in the dark, and after 3 d rehydration, the parameters Fv/Fm, Phi(PSII), qP and NPQ showed full recovery in control Boea leaves under very weak light condition, but the parameters only underwent partial recovery in Boea leaves treated with DTT and Boea leaves in the dark, suggesting that the recovery of photosystem II (PSII) photochemical activities in Boea leaves was obviously affected by treatments with DTT and darkness, therefore, zeaxanthin may play an important protective role in desiccated Boea leaves even under very weak light conditions.