四川地区黄粉虫越冬初报

1998年 11月～ 1999年 4月 ,笔者对黄粉虫幼虫、成虫和蛹的越冬进行了试验。结果 ,成虫全部不能越过冬季 ;蛹能越冬 ,但羽化后的成虫无翅或翅发育不全 ,仅少数发育正常 ,也无生殖能力 ;幼虫越冬较好 ,蛹羽化后形成的成虫能繁殖。因此 ,在四川地区自然条件下进行黄粉虫的养殖 ,应以 13～ 15龄幼虫越冬为好 ,否则只能进行升温养殖。     

亚热带低山区填闲混播冬性一年生牧草与水稻轮作的经济生态效益

１９９２１９９４年在亚热带低山区（四川芦山县）进行了填闲混播冬性一年生牧草与水稻轮作的经济生态效益的研究。结果表明，混播冬性一年生禾草和豆草与水稻轮作，即意大利黑麦草＋紫云英→水稻、意大利黑麦草＋南苜蓿→水稻和意大利黑麦草＋白三叶草（营养体）→水稻三种轮作方式在水稻产量高于或稍低于对照（ＣＫ→Ｒ）但差异不显著的情况下，获得了高的饲料价值（ＴＤＯＭ５．１８５．４５ｔ／ｈｍ２，ＣＰ１．６９１．８４ｔ／ｈｍ２，ＭＥ３．７６４．０１×１０４ＭＪ／ｈｍ２）和良好的营养互补作用。填闲混播一年生豆、禾牧草提高了农田生态位的利用效率，改善了土壤结构和营养状况。     

Dry matter yield and nutritional value of companion crops,intercropped with maize,for grazing purposes in northwestern KwaZulu-Natal

The northwestern part of KwaZulu-Natal (KZN) in South Africa is suitable for sheep farming as well as crop production. However, there are some constraints to animal production due to the low quality of natural vegetation during winter. Alternative winter feeding strategies have been suggested from research conducted in similar vegetation types in other parts of South Africa. Grazing maize is a potential alternative fodder source but its low crude protein might be a limitation to acceptable livestock production. This preliminary study investigated the potential of inter-cropping maize with high protein content crops for providing sheep with fodder of acceptable quality during winter in northwestern KZN.

Raphanus sativus (Japanese radish), Ornithopus sativus (serradella) and Vicia dasycarpa (grazing vetch) showed promising results in terms of dry matter yield and nutritional value. The production of Pennisetum glaucum (babala) and Avena sativa (oats) was relatively high. However, the nutritional value of both these species was marginal. Glycine max (soybeans) and Lablab purpureus (dolichos) showed good and above required nutritional properties, but dry matter yield was low.     

烯效唑拌种对小麦形态及营养的调节效应

本文研究了烯效唑拌种对小麦形态及营养的效应。结果表明：烯效唑具有控上促下的作用,前期形成了健壮发达的根系;同时又具有控前促后的作用,使后期叶面积、干物重、碳氮比均有提高,为穗粒的形成提供了充足的营养,进而使产量提高。