掌控三要素 花卉生长好

一、环境条件 光照不足或过强，温度过高或过低均会影响花卉的生长．银苞芋、鹿角蕨、圆盖阴石蕨、天门冬、合果芋、网纹草等怕强光．光照过强时会出现生长萎缩僵化、叶边枯焦或叶片灼伤等现象。而羽叶甘蓝、美人蕉、迎春花、金钟花、月季、百合等喜欢光照的花卉．光照不足会出现窜高、黄化、不开花或开花少等现象。     

控制茄果类蔬菜徒长七措施

番茄植株徒长的原因主要是土壤过湿，相对湿度80％左右，氮肥偏多，或者连续阴雨天气，空气湿度经常高于50％．60％，光照不足，定植过密，或通风透气不良。辣椒栽培，第一个门椒往往坐不住，就是高温高湿所致。秋番茄温度偏高，氮肥偏多，没有及时定植也易徒长。其主要防止措施简介如下。     

桃树的需肥特点与施肥方法

一、桃树的需肥特点 （一）施肥宜深不宜浅桃树根系发达，侧根和须根较多，吸收力强，但根系分布浅，多集中地表下的20-30厘米土层内。如营养不足，就会影响树势、产量、品质和寿命。所以施肥宜深不宜浅，浅施易引起根系上浮。     

棚室黄瓜为啥化瓜

根据调查：棚室黄瓜化瓜的原因一般一是光照不足；二是温湿度偏高或不稳定；三是水肥不足或氮肥过多旺长；四是病虫危害；五是二氧化碳浓度过低；六是黄瓜采收不及时，营养消耗过大等。其防治措施有以下几点：     

哪些地方不能栽种果树

一是阴坡、光照不足的山谷、大树和高建筑物旁边等光照不好的地方不适宜栽种。桃树、李树、酸梅、杏树和樱桃等大路果树是喜光类植物，如果没有充足的阳光，枝条就会枯死，成花困难，坐果率低，果实口感偏淡。     

Nutrient Deficiency Affects Root Architecture of Young Seedlings of Malus hupehensis （Pamp） Rehd. Under Conditions of Artificial Medium Cultivation

What the researchers go in for is to establish models between root architecture （RA） changes and nutrition, mold ideal root architecture of apple trees, improve the nutrient uptake efficiency, and further explore the functional mechanism of nutrient elements during the course of RA construction. The cultivation system of filter paper is utilized to research the effect of nutrient deficiency on the RA of Malus hupehensis （Pamp.） Rehd. There may be eight types of RA. In complete Hogland solution, the main type of RA is ＂lateral roots clustering in the upper and middle regions of primary root＂. With the lack of P, K or Ca, the main type of RA is ＂lateral roots clustering in the upper region primary root＂, and the ＂lateral roots clustering in the upper and middle regions of primary root＂ types of RA decrease. But with shortage of P, the type of lateral roots clustering in the upper and lower regions of primary root increases, and the type of lateral roots clustering in the middle region of primary root decreases, with the types of RA diversified. Under the condition of K deficiency, the type of no lateral root increases and types of lateral roots clustering in the middle region of primary root decrease, and the percentage of such types as ＂no lateral root＂, ＂lateral roots clustering in the upper region of primary root＂, and ＂lateral roots clustering in the upper and middle regions of primary root＂ accounts for 97.9% in all, with the types of RA simplified. With lack of Fe, Mg or Zn, the main type of RA is ＂lateral roots clustering in the upper and middle regions of primary root＂, but the type of lateral roots evenly-distributed on primary root increases. The main type of RA is ＂lateral roots evenlydistributed on primary root＂, under the condition of N deficiency, and the types of RA turn out to be diversified. There exists a close relation between nutrient deficiency and RA changes. Owing to various forms of nutrient deficiency, correspondingly different types of RA have been produced.     

农村消费者如何维权投诉

有些母牛产犊后出现奶水不足的情况，直接影响犊牛的生长发育和成活，特别是秋末冬初至严冬，天气寒冷，更应想法解决好此问题。     

江西省农民专业合作社发展的现状及对策

从江西省农民专业合作社发展现状着手,指出目前合作社发展所取得的成效和存在的不足,并提出相应的对策建议。     

我可以提前收回责任田吗

编辑同志：2004年，因家庭劳动力不足，我和村里几户人家向村委会提交了退回责任田给村民小组的申请书，申请书中写明了期限。村委会同意了我们的申请，并由我找人耕种。由于我们打工返乡以及儿孙们相继长大，现在我们都想提前要回责任田由自己耕种，已向村委会口头申请，但没有得到答复。